Algebra

NZ Level 6 (NZC) Level 1 (NCEA)

Expand difference of two squares

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

$a^2-b^2$`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

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