ALGEBRA 2 PLEASE HELP
posted by Kesha .
How do I solve this quadratic function by finding square roots 2x²=200 ?

Set it to 0
2x²  200 = 0
Factor out the 2
2(x²  100) = 0
Use difference of squares
2(x + 10)(x  10) = 0
Solve for x
x = /+ 10 
Set the equation to 0 and solve for x.
2x^2 = 200
Divide both sides by 2.
x^2 = 200/2
x^2 = 100
Take square root of both sides.
x = positive 10 and negative 10
Always a positive and negative answer in terms of square roots.
Done!