Question

solve the equation by completing the square. Round to the nearest hundredth if necessary.

3. x2 + 2x – 8 = 0 (1 point)
4, 2
–4, 2
4, –2
–4, –2

Answer 1

x2 + 2x – 8 = 0
x2 +2x +1 =9
(x+1)^2 =9
x+1 = ±3

so x+1=3 or x+1=-3
x=2 x=-4