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September 21, 2014

September 21, 2014

Posted by **John** on Wednesday, August 22, 2012 at 4:11pm.

- Geometry -
**Reiny**, Wednesday, August 22, 2012 at 5:02pmold area = 300*400 = 120 000

new area = 240 000

(300+2x)(400+2x) = 240000

120000+1400x + 4x^2 = 240000

simplify and divide by 4.

x^2 + 350x - 30000 = 0

x = (-350 ± √242500)/2

= appr 71.22 or some negative which we will reject

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