Write an equation equivalent to the one below by writing the trinomial as a perfect square trinomial. x2 + 8x + 9 = - 9 ?
x2 + 8x + 16 = 16
x2 + 8x + 16 =- 2
x2 + 8x + 64 = 46
x2 + 8x + 64 = 64
x2 + 8x + 16 = 16
x2 + 8x + 16 =- 2
x2 + 8x + 64 = 46
x2 + 8x + 64 = 64
1 Answer
Feb 26, 2018
Explanation:
using the method of completing the square
x2+2(4)x+16−16+9=−9
⇒x2+8x+16−7=−9
⇒x2+8x+16=−9+7
⇒x2+8x+16=−2