David M.

asked • 07/14/14

Select the product of (9x - 2)(5x + 9).

need help solving this problem

1 Expert Answer

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Philip P. answered • 07/14/14

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(9x-2)(5x+9)
 
Use the FOIL (first, outer, inner, last) method to multiply the two binomials together:
 
(9x)(5x) + (9x)(9) + (-2)(5x) + (-2)(9)
   45x2    +    81x    -    10x      -    18
 
Combine like-terms (81x-10x=71x):
 
45x2 + 71x - 18
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