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January 30, 2015

January 30, 2015

Posted by **marie** on Thursday, June 2, 2011 at 4:45pm.

- math -
**MathMate**, Thursday, June 2, 2011 at 6:35pmLet

H=height in cm.

Base = 2H+6 cm

Area = (1/2)*H*base = 28

H(2H+6)=2*28=56

2H²+6H-56 = 0

H²+3H-28=0

Factorize

(H-4)(H+7)=0

H=4

or H=-7 (negative rejected)

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