Provide an appropriate response.The FOIL method can be used to show that (5x + 10)(x - 9) = 5x2 - 35x - 90. If you were asked to factor the expression 5x2 - 35x - 90 completely, why would it be incorrect to give (5x + 10)(x - 9) as your answer?
What will be an ideal response?
There is still a common factor of 5 that should be factored out.
(5x + 10)(x - 9) = 5(x + 2)(x - 9)
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