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January 31, 2015

January 31, 2015

Posted by **Amalia** on Tuesday, May 14, 2013 at 11:39am.

4.0= (2x)^2 / (1.0-x)(1.0-x)

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

- math -
**Reiny**, Tuesday, May 14, 2013 at 12:51pmyour equation becomes:

4 = 4x^2/(1-x)^2

multiply both sides by (1-x)^2

4(1-x)^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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