Question

Solve the equation using the method of completing the square 2x squared + 16 x - 8 0

Answer 1

A for PLATO

Explanation:

Answer 2

-4 + 2*sqrt(5)

Explanation:

2x^2+16x-8=0

Factor out the 2: 2(x^2+8x)-8=0

Add (b/2)^2 = (8/2)^2 = 16

2(x^2+8x+16)-8 = 0 + 2*16

2(x+4)^2=40

(x+4)^2=20

x+4=+sqrt(20)

x=-4+sqrt(20) = -4 + 2*sqrt(5)