Question

Solve 2x²-8=0
A. X = 4
B. X = 2
C. x = 4, -4
D.x = 2, -2

Answer 1

D. x=2, -2

Explanation:

I think you're asking for the correct answer to the problem because all of the values for x won't work for the equation.

So all we have to do is simplify the equation to isolate x.

`2x^2-8=0` (original problem)

`2x^2=8` (add 8 to both sides)

`x^2=4` (divide both sides by 2)

`x=2, x=-2` (find the square root of both sides)

Note that x = ±2 and note just 2 because both
`2^2` and
`(-2)^2`
`=4`.

Hope this helped :D

Answer 2

X^2=4 take root of both

So option D

-2,2