Answers

2015-07-01T22:52:54+08:00
3(x+2)^2=2x^2+3x-8
3(x^2+4x+4)= 2x^2+3x-8
3x^2+12x+12=2x^2+3x-8
3x^2+12x+12-2x^2-3x+8=0
x^2+9x+20=0 or (x+5)(x+4)
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