Question
Factorise:
$ x^2+8 x+16 $
$ x^2+8 x+16 $
✓
Answer
$ x^2+8 x+16 $
$ =(x)^2+2 \times x \times 4+(4)^2 $
$ =(x+4)^2 $
$ =(x)^2+2 \times x \times 4+(4)^2 $
$ =(x+4)^2 $
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