math
posted by Amalia .
How do I set up the quadratic equation for this problem?
4.0= (2x)^2 / (1.0x)(1.0x)
I know how to use the formula, but I have a hard time setting those equation to zero. Please explain step by step.
Thank you

your equation becomes:
4 = 4x^2/(1x)^2
multiply both sides by (1x)^2
4(1x)^2 = 4x^2
4(1  2x + x^2) = 4x^2
4  8x + 4x^2 = 4x^2
4=8x
x = 1/2
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