2n^2 -5n -12 my helper is not around can someone helps me SOLVE THIS

Question

anonymous · Answer

COULD THIS START WID 2N

anonymous · Answer

$$(2n + a)(n + b) = 2n^2 - 5n - 12$$$$\implies2b + a = -5$$and$$a*b = -12$$

anonymous · Answer

yep!

anonymous · Answer

UMMMM 3 AND 4

anonymous · Answer

Right, but one must be negative and one must be positive if they multiply to make -12.

anonymous · Answer

And since they add to make -5, probably a good bet that it's the bigger one that's negative.

anonymous · Answer

-4 , +3

anonymous · Answer

4X^2  -36X + 30 I KNOW ITS START WITH 2X AND ALSO IT HAS 15 N 6 BUT I DONT KNOW TO PUT THEM TOGTHER

anonymous · Answer

Are you sure you have that right? That trinomial doesn't factor well.

anonymous · Answer

4X^2  -26X + 30

anonymous · Answer

That's better. I think you'll find that the factors have the form:

(4x + a)(x + b)

Not:

(2x + a)(2x + b)

anonymous · Answer

So that means that

4b + a = -26

and

a * b = 30

anonymous · Answer

5 N 6