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October 23, 2014

October 23, 2014

Posted by **math1** on Sunday, December 19, 2010 at 7:35am.

- solving quadratic equations by factoring -
**Damon**, Sunday, December 19, 2010 at 7:41am(15-x)(20-x) = (1/2)(15*20)

2(15-x)(20-x) = 300

300 - 35 x + x^2 = 150

x^2 -35 x + 150 = 0

(x - 5)(x - 30) = 0

that is zero if

x = 5 or if x = 30

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