Can someone answer this for this is timed and has to be done by 9: i will give you

You could use the difference of two squares method.

Divide both sides of the equation by 2 to get x^2 = 100

Subtract 100 from both sides to get x^2 - 100 = 0

Then factor it to get (x - 10)(x + 10) = 0

Set each factor equal to 0 and solve

x - 10 = 0
x = 10

and

x + 10 = 0
x = - 10