Algebra II

Hong Kong

Stage 1 - Stage 3

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

$a^2-b^2$`a`2−`b`2

A

$a^2+b^2$`a`2+`b`2

B

$a^2+2ab+b^2$`a`2+2`a``b`+`b`2

C

$a^2-2ab+b^2$`a`2−2`a``b`+`b`2

D

Easy

Less than a minute

Expand the following:

$\left(m+3\right)\left(m-3\right)$(`m`+3)(`m`−3)

Expand the following:

$\left(x-7\right)\left(x+7\right)$(`x`−7)(`x`+7)

Expand the following:

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

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