Question
Multiply: $(-2x + 3y)(2x - 3y)$
✓
Answer
$(- 2x + 3y)(2x - 3y)$
$\Rightarrow - 2x (2x - 3y) + 3y(2x - 3y)$
$\Rightarrow - 4x^2 + 6xy + 6xy - 9y^2$
$\Rightarrow - 4x^2 + 12xy - 9y^2$
$\Rightarrow - 2x (2x - 3y) + 3y(2x - 3y)$
$\Rightarrow - 4x^2 + 6xy + 6xy - 9y^2$
$\Rightarrow - 4x^2 + 12xy - 9y^2$
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