Question
Use suitable identity to find the product: $(3 - 2x)(3 + 2x)$
✓
Answer
$(3 - 2x)(3 + 2x) = (3)^2 - (2x)^2$
Using Identity $a^2- b^2$
$= (a- b)(a+ b) $
$= 9 - 4x^2$
Using Identity $a^2- b^2$
$= (a- b)(a+ b) $
$= 9 - 4x^2$
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