Question
Using the formula $(a + b)^2= (a^2+ 2ab + b^2),$ evaluate:
$(630)^2$
$(630)^2$
✓
Answer
$ (630)^2 $
$ =(600+30)^2 $
$ =(600)^2+2 \times 600 \times 30+(30)^2 $
$= (360000 + 36000 + 900)$
$= 396900$
$ =(600+30)^2 $
$ =(600)^2+2 \times 600 \times 30+(30)^2 $
$= (360000 + 36000 + 900)$
$= 396900$
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