Question
Evaluate using the expansion of $(a + b)^2$ or $(a – b)^2: (9.4)^2$
✓
Answer
$(9.4)^2= (10 − 0.6)^2$
$= (10)^2 + (0.6)^2 − 2 (10) (0.6)$
$= 100 + 0.36 − 12$
$= 88 + 0.36 $
$= 88.36$
$= (10)^2 + (0.6)^2 − 2 (10) (0.6)$
$= 100 + 0.36 − 12$
$= 88 + 0.36 $
$= 88.36$
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