Question

so...splitting middle term for this problem
5x^2-7x-6
answer would be (x-2) (5x+3)
correct? Again...calculator says incorrect??

Answer 1

No, when you multiply this back out you get
5x^2 + 3x - 7x -6
5x^2 -4x -6

Answer 2

So, that's not quite right.

Answer 3

Since a and c are 5 and -6, you need two numbers that multiply to get -30.

Answer 4

And since b is -7, those same two numbers need to add to get -7.

Answer 5

Can you think of two numbers that multiply to get -30 and add to get -7?

Answer 6

@ctg?

Answer 7

Or do you have no idea what I am talking about?