Friday

April 18, 2014

April 18, 2014

Posted by **help me again(last one)** on Thursday, April 26, 2007 at 9:03pm.

Area=1/2 B*H= 1/2 B (2B+4)

solve for B

h = 4 + 2b

b = ?

A = (b*h)/2 = 168

168 = [b(4+2b)]/2

168 = (4b + 2b^2)/2

336 = 4b + 2b^2

2b^2 + 4b - 336 = 0

2(b^2 + 2b - 168) = 0

2(b-12)(b+14) = 0

b=12 and b=-14

Ignore the negative answer, negative distances have no real meaning.

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