Question
Solve:
$ 4 x^2+12 x y+9 y^2 $
$ 4 x^2+12 x y+9 y^2 $
✓
Answer
$ 4 x^2+12 x y+9 y^2 $
$ =(2 x)^2+2 \times 2 x \times 3 y+(3 y)^2 $
$ =(2 x+3 y)^2 $
$ =(2 x+3 y)(2 x+3 y) $
$ =(2 x)^2+2 \times 2 x \times 3 y+(3 y)^2 $
$ =(2 x+3 y)^2 $
$ =(2 x+3 y)(2 x+3 y) $
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