Answers

2016-07-01T00:27:15+08:00
X^2+2x-15= (x+5)(x-3)
Solution:
2x -15
Factors. Sum. Product
1 -15. -14 -15
-1 15. 14. -15
3 -5. -2. -15
-3 5. 2. -15. **

Or do it the with a twist if you're advanced
Just think of two numbers that when you Multiply to each other, you can get the last term and when you add it to each other, you can get the middle term. Remember that the positive or negative sign is important.
0