## tmts98 Group Title I need some help with factoring quadratics. one year ago one year ago

1. syhna Group Title

2. tmts98 Group Title

I was looking over my notes for my midterm in Algebra II, and I think I copied down this wrong. It says if my original equation is -x²+14x+40 my factored equation would be -1(x+10)(x+4), I foiled this out because it looked wrong and I got positive x²+14+40. What do I have wrong?

3. tmts98 Group Title

*this down by the way...

4. syhna Group Title

-(x^2 - 14 - 40) now factor x^2 - 14 - 40 using either the quadratic formula of completing the square

5. tmts98 Group Title

Well, I used the quadratic formula and I got: $x=7\pm3\sqrt{2}$ Is this right?

6. funinabox Group Title

to check if your answer is correct, plug the number(s) back into your original expression. if the answer you get is 0, then you have found the correct roots

7. funinabox Group Title

because the whole point of factoring is to find what x values make f(x) = 0

8. tmts98 Group Title

Well, now I am just more confused then when I started,.