Yohan C. answered • 09/21/14
Tutor
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Math Tutor (up to Calculus) (not Statistics and Finite)
In this case A is 2, B is +7, and C is +5. Since A is 2, it will look something like this:
(2x ) (x ). And now, let's look at the C value: 5. And C is +5, which means 1&5 are the only pair that can multiply and make 5 and they must share same signs. Since middle term is positive, both 1&5 will be +. So it will look like this:
(2x+5) (x+1). Why? because if you put 5 outside, it will multiply with 2x, which it gives you 10x. So, +5 must stay with 2x and +1 stay with x in the other term.
Good luck.
