Question
If $x = 2$ and $y = − 4,$ evaluate:
$(5y)^2$
$(5y)^2$
✓
Answer
$(5y)^2$
$= 5 \times y \times 5 \times y$
$= 5 \times (− 4) \times 5 \times (− 4)$
$= (− 20) \times (− 20)$
$= 400$
$= 5 \times y \times 5 \times y$
$= 5 \times (− 4) \times 5 \times (− 4)$
$= (− 20) \times (− 20)$
$= 400$
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