Question 123886
The given expression is: 


y = {{{x^2 + 7x - 18 }}} 


By the method of factoring: 


{{{x^2 + 9x - 2x - 18}}}


x(x + 9) - 2(x + 9)


==> (x + 9)(x - 2) 


Thus the solution.


Hence the solution set is: (-9,2) 


That is option  (d) is the right answer.


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