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July 31, 2014

July 31, 2014

Posted by **YKWCH** on Tuesday, December 4, 2012 at 11:43am.

- Pre-Calc -
**Steve**, Tuesday, December 4, 2012 at 11:50am270 = x(14-2x)(20-2x)

4x^3 - 68x^2 + 280x - 270 = 0

x = 1.4 or 4.2

not sure what tools you have to solve cubics. In this case a simple graphic method gives approximate results.

visit wolframalpha.com and type in

solve x(14-2x)(20-2x) = 270

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