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msteph012311

  • 2 years ago

trying to find x and y intercepts for ... y=x^2+2.2x+1.21 and y-x^2=7x

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  1. hartnn
    • 2 years ago
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    hint :To get x-intercept put y=0 in the equation to get y-intercept put x=0 in the equation

  2. msteph012311
    • 2 years ago
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    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
    • 2 years ago
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    x^2+2.2x+1.21 = 0 this can be factored, and -1 ,-1.2 is incorrect

  4. msteph012311
    • 2 years ago
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    so i cant use the quadratic formula?

  5. hartnn
    • 2 years ago
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    those are correct, just be accurate -1,-1.21 (instead of just -1.2)

  6. hartnn
    • 2 years ago
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    and u can use formula also

  7. msteph012311
    • 2 years ago
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    what about the second one i dont know where to start?

  8. hartnn
    • 2 years ago
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    did u get y-intercept for 1st ?

  9. msteph012311
    • 2 years ago
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    yes i got 1.21

  10. hartnn
    • 2 years ago
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    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
    • 2 years ago
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    sorry for late reply, i got disconnected

  12. msteph012311
    • 2 years ago
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    x=0 and x=7? right because i moved the -x^2 to the right

  13. hartnn
    • 2 years ago
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    0 and -7 ?

  14. msteph012311
    • 2 years ago
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    its ok....and oh yea -7

  15. hartnn
    • 2 years ago
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    any more doubts ? all clear ?

  16. msteph012311
    • 2 years ago
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    nope thank you so much :)

  17. msteph012311
    • 2 years ago
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    can you help me with a few more though?

  18. hartnn
    • 2 years ago
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    i am already helping 2-3 ppl at same time, i'll try though...

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