Question
Evalute:
$\left\{(7.8)^2-(2.2)^2\right\}$
$\left\{(7.8)^2-(2.2)^2\right\}$
✓
Answer
$(7.8)^2-(2.2)^2$
$=(7.8+2.2)(7.8-2.2)$
$=10.00 \times 5.6$
$=56$
$=(7.8+2.2)(7.8-2.2)$
$=10.00 \times 5.6$
$=56$
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