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Class 7 Maths
Algebriac Expressions
Quiz 1
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Match the column
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p -> ii, q -> iii, r -> i
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p -> i, q -> iii, r -> ii
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p -> iii, q -> ii, r -> i
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p -> i, q -> ii, r -> iii
The coefficient of xy in $3x^2zy -16xyz -2z^2 x$ is
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-16 z
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16 z
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16
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-16
Identify the binomial out of the following
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$3xy^2 + 5y – x^2y$
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$x^2y – 5y – x^2y$
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xy + yz + zx
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$3xy^2 + 5y – xy^2$
what should be added to -4 to get 2xy
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2xy -4
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2xy
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2xy + 4
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4 -2xy
The value of $3x^2 -5x -3$ when x=1 is
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5
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0
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-1
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-5
Sum of the products of a and b, b and c and c and a
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a+b+c
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(a+b)(b+c)(c+a)
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ab + bc + ac
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abc
The value of p if the value of $2x^2 + 2x – 3p+1$ equals to 10, when x = 0?
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-2
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3
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-3
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0
The rate of planting the grass is Rs x per square metre. Find the cost of planting the grass on a triangular lawn whose base is y metres and height is z metres.
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Rs xyz
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Rs xyz/2
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Rs x(y+z)
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None of these
The sum of $4x^2 +3x -4$ , $3x^2 – 2x +6$
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$12x^2 +x +2$
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$7x^2 +x +24$
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$7x^2 +x -24$
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$7x^2 +x +2$
$6x^2 – 3x^2=$ ?
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$3x^2$
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$9x^2$
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$18x^2$
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$-3x^2$
$(3x^2 - \frac {2}{5}x +\frac {7}{3} ) – (-2x^2 - \frac {4}{5} x + \frac {5}{3})=$ ?
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$5x^2 - \frac {2}{5}x - \frac {2}{3}$
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$5x^2 +\frac {2}{5}x - \frac {2}{3}$
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$5x^2 +\frac {2}{5}x + \frac {2}{3}$
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$5x^2 -\frac {2}{5}x + \frac {2}{3}$
Multiply $3ab$ by $6ab^2$
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$18a^2b^3$
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$18a^3b^2$
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$-18a^2b^3$
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$9a^2b^3$
$x(y-z) + (y(y-z) + z(x-y)$=
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$x+y+z$
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$2(x+y+z)$
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0
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$(x-y+z)$
$(x^3+y^3 ) \times (x^2 –y^2)$=
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$x^5 + y^5- x^2y^2( x+y)$
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$x^5 –y^5 + x^2y^2( x+y)$
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$x^5 –y^5- x^2y^2( x-y)$
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$x^5 –y^5- x^2y^2( x+y)$
Simplify (4x +3)(3x-4) + (4x-3)(x +2)
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16x^2 +2x -18
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16x^2 -2x +18
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16x^2 -2x -18
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16x^2 +x +18
Value of $a^3 + a^2b + ab^2 + b^3$ at a = 1 and b = – 2
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1
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0
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5
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-5
Add $2a^2 + 4b -3c$ and $a^2 + 3b +6c$
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$2a^2 +7b +3c$
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$3a^2 +7b +c$
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$3a^2 +4b +3c$
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$3a^2 +7b +3c$
Add $(4x^2 - \frac {1}{6}x + \frac {5}{2})$ , $(- \frac{1}{5}x^2 + \frac {1}{3}x - \frac {3}{2})$
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$\frac {19}{5} x^2 + \frac {1}{6}x +1$
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$\frac {19}{5} x^2 + \frac {1}{2}x +1$
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$\frac {22}{5} x^2 + \frac {1}{6}x +1$
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$\frac {19}{5} x^2 + \frac {1}{4}x +1$
$(4a^2 +2a -5) – (3a^2 -4a -8)$=
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$a^2 +8a +3$
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$a^2 +6a -3$
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$a^2 +6a +3$
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$a^2 -6a +3$
Subtract $(\frac {7}{3}x^2 - \frac {2}{3} x^3 + \frac {5}{2}x -3)$ from $( \frac {5}{3}x^2 - \frac {4}{7}x^3 +\frac {7}{3} x+8)$
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$\frac {2}{21} x^3 -\frac {2}{3}x^2 +\frac {1}{6}x +11$
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$\frac {2}{21} x^3 -\frac {1}{3}x^2 -\frac {1}{6}x -11$
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$\frac {2}{21} x^3 -\frac {1}{3}x^2 -\frac {1}{6}x +11$
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$\frac {2}{21} x^3 -\frac {2}{3}x^2 -\frac {1}{6}x +11$
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