Question
Factorise:
$ 1+2 x+x^2$
$ 1+2 x+x^2$
✓
Answer
$ 1+2 x+x^2$
$=(1)^2+2 \times 1 \times x+(x)^2 $
$ =(1+x)^2 $
$=(1)^2+2 \times 1 \times x+(x)^2 $
$ =(1+x)^2 $
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