Question 888628: x^2+(2x+6)2=(2x+4)^2
Answer by Okamiden(22)   (Show Source):
You can put this solution on YOUR website! Develop the parentheses and send everything on the same side.
x^2 + 4x + 12 = 4x^2 + 16x + 16
0 = 3x^2 + 12x + 4
This is a quadratic equation for which you have a formula. Plug a=3, b=12, c=4 in the quadratic formula.
Answer: x = -2/3 *(3+sqrt(6)) and x = 2/3 * (-3+sqrt(6))
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