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Select the correct answer.

Solve the equation using the method of completing the square.
2x^2 + 163 - 8 = 0

Select the correct answer. Solve the equation using the method of completing the square-example-1
User Padibro
by
7.5k points

1 Answer

3 votes

Answer:

D

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=√(20) or
x+4=-√(20)

x = -4±
√(20)

x= -4±
2√(5)

User Geoff Davids
by
8.8k points

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