SOLUTION: How to factro this quadratic expression? 3x^2-4x-15 please help

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Question 423544: How to factro this quadratic expression?
3x^2-4x-15
please help
Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
3 only has one set of factors , 3 and 1 ___ so the first terms of the two binomial factors are 3x and 1x

now you have to find factors of -15 that can "combine" with the the 3x and 1x to give -4x
___ like -3 and 5

(3x + 5)(x - 3)