Question

Select the correct answer.

Answer 1

Answer:

D

Step-by-step explanation:

$2x^2+16x-8=0$

Simplify:

$x^2+8x=4$

Rewrite in the form $(x+a)^2=b$:

$x^2+8x=4$

Add $4^2$ to both sides:

$x^2+8x+4^2=4+4^2$

$x^2+8x+4^2=20$

$\left(x+4\right)^2=20$

$x+4=\sqrt{20}$ or $x+4=-\sqrt{20}$

x = -4±$\sqrt{20}$

x= -4±$2\sqrt{5}$

Answer 2

Answer:

d

Step-by-step explanation: