Answers

2016-07-12T17:46:29+08:00
The factors are (x+9) and (x+2) and it's roots are -9 and -2.
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2016-07-12T18:02:07+08:00
 x^{2}  +11x+18=0
(x+2)(x+9)=0
therefore the roots are
 x_{1}=-2
 x_{2}=-9
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