Question

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

Answer 1

COULD THIS START WID 2N

Answer 2

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

Answer 3

yep!

Answer 4

UMMMM 3 AND 4

Answer 5

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

Answer 6

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

Answer 7

-4 , +3

Answer 8

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

Answer 9

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

Answer 10

4X^2 -26X + 30

Answer 11

That's better. I think you'll find that the factors have the form:

(4x + a)(x + b)

Not:

(2x + a)(2x + b)

Answer 12

So that means that

4b + a = -26

and

a * b = 30

Answer 13

5 N 6