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India
Class VIII

Expand difference of two squares

Interactive practice questions

Which of the expressions below is equivalent to $\left(a+b\right)\left(a-b\right)$(a+b)(ab)?

$a^2-b^2$a2b2

A

$a^2+b^2$a2+b2

B

$a^2+2ab+b^2$a2+2ab+b2

C

$a^2-2ab+b^2$a22ab+b2

D
Easy
< 1min

Expand the following:

$\left(m+3\right)\left(m-3\right)$(m+3)(m3)

Easy
< 1min

Expand the following:

$\left(x-7\right)\left(x+7\right)$(x7)(x+7)

Easy
< 1min

Expand the following:

$\left(v+\frac{1}{7}\right)\left(v-\frac{1}{7}\right)$(v+17)(v17)

Easy
1min
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Outcomes

8.A.AE.3

Identities (a ± b)^2 = a^2 ± 2ab + b^2, a^2 – b^2 = (a – b) (a + b) Factorisation (simple cases only) as examples the following types a(x + y), (x ± y)^2, a^2 – b^2, (x + a).(x + b)

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