You can put this solution on YOUR website! rewrite3 the middle term as the sum of two terms and then factor completely:
9x^2-9x-10
This is called the AC Method of factoring.
Think of two numbers whose product is AC = -10*9 = -90
and whose sum is B = -9
The numbers are -15 and +6
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Rewrite the problems with the sum replacing the 2nd term:
9x^2-15x+6x-10
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Factor the 1st two and the last two terms separately to get:
3x(3x-5)+2(3x-5)
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