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boog1

  • 4 years ago

apply the quadratic formula to find the roots of the given function, and then graph the function f(x)=y^2-9 please show work for credit

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  1. 101Ryan101
    • 4 years ago
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    OM goodness! :/

  2. boog1
    • 4 years ago
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    lol

  3. boog1
    • 4 years ago
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    thats what i said

  4. 101Ryan101
    • 4 years ago
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    ha ah.. Hey, are you sure that's written correctly? :/

  5. 101Ryan101
    • 4 years ago
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    usually it's f(x) = x^2 - 9

  6. 101Ryan101
    • 4 years ago
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    not y^2 - 9

  7. boog1
    • 4 years ago
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    f(x) = x^2 - 9

  8. 101Ryan101
    • 4 years ago
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    ok, soooooo. huh... I guess f(x) = x?? lol

  9. boog1
    • 4 years ago
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    i am having problems figuring out a b c for the formula

  10. 101Ryan101
    • 4 years ago
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    weird. then it should be f(y) = y^2 -9 because we are dealing with a function of y

  11. boog1
    • 4 years ago
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    it is changed to x

  12. boog1
    • 4 years ago
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    f(x) = x^2 - 9

  13. 101Ryan101
    • 4 years ago
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    AND there is no need to use the quadratic because you can factor this! x^2 - 9 = x^2 - 3^2 = (x+3) (x-3) so x is simply plus or minus 3! use the quadratic? for what! lol

  14. boog1
    • 4 years ago
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    finding the roots

  15. 101Ryan101
    • 4 years ago
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    well, the roots are -3 and 3 but anywyay with the quadratic you want to use (1)x^2 + 0x - 9 a = 1 b = 0 c = -9

  16. boog1
    • 4 years ago
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    ok now I think I got it from there

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