## msteph012311 3 years ago trying to find x and y intercepts for ... y=x^2+2.2x+1.21 and y-x^2=7x

1. hartnn

hint :To get x-intercept put y=0 in the equation to get y-intercept put x=0 in the equation

2. msteph012311

thanks i know that part lol i just dont know how to go from there...like for the first one i did y=0 then i just used the quadratic formula is that right? i got -1 and -1.2?

3. hartnn

x^2+2.2x+1.21 = 0 this can be factored, and -1 ,-1.2 is incorrect

4. msteph012311

so i cant use the quadratic formula?

5. hartnn

those are correct, just be accurate -1,-1.21 (instead of just -1.2)

6. hartnn

and u can use formula also

7. msteph012311

what about the second one i dont know where to start?

8. hartnn

did u get y-intercept for 1st ?

9. msteph012311

yes i got 1.21

10. hartnn

now for 2nd eq., put x=0 for y-int., y-x^2=7x y=0 so y-intercept = (0,0) put y=0 for x-int y-x^2=7x 0=x^2+7x i believe u can solve this

11. hartnn

sorry for late reply, i got disconnected

12. msteph012311

x=0 and x=7? right because i moved the -x^2 to the right

13. hartnn

0 and -7 ?

14. msteph012311

its ok....and oh yea -7

15. hartnn

any more doubts ? all clear ?

16. msteph012311

nope thank you so much :)

17. msteph012311

can you help me with a few more though?

18. hartnn

i am already helping 2-3 ppl at same time, i'll try though...