Answers

2014-09-22T20:14:33+08:00
2014-09-22T20:16:48+08:00
X=6 or X= -7

(x+4)(x-3)=30
x2+x-12=30
x2+x-12-30=0
x2+x-42=0
(x+7)(x-6)=0
x= -7 / x=6

-7+4= -3      -7-3= -10    L= -3   W= -10  Area=LxW -3 x -10= 30
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