Friday

December 19, 2014

December 19, 2014

Posted by **Kate** on Sunday, February 17, 2008 at 1:10pm.

- math -
**drwls**, Sunday, February 17, 2008 at 1:30pmLet x be the distance of the foot from the wall. Then use the Pythagorean theorem.

x^2 + (x+3)^2 = 15^2 = 225

2x^2 +6x -216 = 0

x^2 +3x -108 = 0

That factors easily. (Think: 9x12 = 108)Take the positive root.

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