## Tresag 3 years ago use the quadratic formula to find any x-intercepts on the graph of the equation. y=x^2+2x-10

1. sasogeek

2. Tresag

I don't know

3. Tresag

ax^2+bx+c=0 ?

4. sasogeek

nope :P well the quadratic formula states that $$\huge x=\frac{-b \pm \sqrt{b^2-4ac}}{2a}$$

5. sasogeek

can you continue now that you have the formula?

6. Tresag

no

7. sasogeek

ok so if you have $$\huge ax^2+bx+c=0$$ substitute the values of a b and c into the formula and solve it.

8. sasogeek

are we okay now?

9. Yahoo!

To find x-intercepts put y =0 in y=x^2+2x-10

10. Tresag

no

11. Yahoo!

12. Tresag

ok how do I do that ?

13. sasogeek

you have an equation similar to ax^2+bx+c=0 substitute the values into the quadratic formula i gave you, and solve it algebraically

14. Tresag

I don not know how to do that ???????

15. sasogeek

a=1 b=2 c=-10 replace that into the equation that into the formula

16. sasogeek

how are we doing?

17. Tresag

x^2+2x+-10=0

18. sasogeek

19. Tresag

so now what do I do w/ it ?

20. sasogeek

i told you what a,b, and c are in that equation. a=1 b=2 c=-10 replace the values of a,b and c into the quadratic formula i gave you and solve it to find x

21. sasogeek

which part of that don't you understand? :/