Question

If a+b = 4 and a*b=-12, find a-b

Answer 1

Answer:

8

Explanation:

Answer 2

Answer:

-8 or 8

Explanation:

Factors of 12 are: 1 and 12, 2 and 6, 3 and 4.

Because it's negative 12, you need to find two factors of 12 where one is negative, and you can add them to get 4. This means that a and b are -2 and 6. -2+6=4 and -2*6=-12.

We still don't know if a is -2 and b is 6 or if it is the other way around, so it could be -6-2=-8 or 2-(-6)=8

Hope this helped! (Sorry I may not be the best at explaining things, and this assumes you already know a little about this subject. By the way, are you trying to factor a quadratic equation?)