SOLUTION: Factor completely and FOIL x^2 + 9x + 20

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Question 79386: Factor completely and FOIL
x^2 + 9x + 20
Answer by tutorcecilia(2152) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 + 9x + 20
Factor 20: 4 x 5 will add up to the middle term (4+5=9, so,
(x+4)(x+5)
.
Using FOIL to multiply:
xx+5x+4x+(4)(5)
x^2+9x+20