Posted by Kesha on Monday, February 11, 2008 at 9:23pm.
How do I solve this quadratic function by finding square roots 2x²=200 ?

ALGEBRA 2 PLEASE HELP  Anonymous, Monday, February 11, 2008 at 9:27pm
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

ALGEBRA 2 PLEASE HELP  Guido, Tuesday, February 12, 2008 at 7:04am
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!
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