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mathtard

  • 4 years ago

Find the x and y intercepts f(x) = -x^2+4x+45

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  1. Rita1975
    • 4 years ago
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    X intercept means plug in f(x) = 0 and solve for x Y intercept means plug in x =0 and find f(x)

  2. LagrangeSon678
    • 4 years ago
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    |dw:1314673518595:dw|

  3. anonymous
    • 4 years ago
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    y intercept is the constant in this case it is (0,45)

  4. mathtard
    • 4 years ago
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    ok, so how do i get the x intercept?

  5. LagrangeSon678
    • 4 years ago
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    i just got them for you

  6. LagrangeSon678
    • 4 years ago
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    did you look at the drawing

  7. LagrangeSon678
    • 4 years ago
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    |dw:1314673935920:dw|

  8. mathtard
    • 4 years ago
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    so 0,45 isn't correct?

  9. LagrangeSon678
    • 4 years ago
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    that is the y intecept

  10. LagrangeSon678
    • 4 years ago
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    the i wrote (9,0) and (-5,0) are the x intercpets

  11. mathtard
    • 4 years ago
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    ok I guess Im just confused now.

  12. LagrangeSon678
    • 4 years ago
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    thats cause you need to study more

  13. mathtard
    • 4 years ago
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    I guess I do, but you are here to help people who don't get it as easily as you do right?

  14. LagrangeSon678
    • 4 years ago
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    yeah i am

  15. LagrangeSon678
    • 4 years ago
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    here man, check this out: To find the x intercepts, set y to be 0 and factor the polynomial like i did above, then set each term to zero and solve for x. To find the y intercept, set x to be zero and evaluate

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