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Jerrychau

f( x)

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  • eric
    2019-05-30 21:48:21
    a.f(0)=18, f(-1)=14
    -6p+q=18 ... (1)
    -5p+q=20 ... (2)
    (2)-(1): p=2
    q=30
  • eric
    2019-05-30 22:27:35
    Correction: f(0)=18, f(-1)=14
    -6p+q=18 ... (1)
    -5p+q=16 ... (2)
    (2)-(1): p=-2
    q=6
    •  eric 2019-05-30 21:48:21
    • a.f(0)=18, f(-1)=14 -6p+q=18 ... (1) -5p+q=20 ... (2) (2)-(1): p=2 q=30
  • eric
    2019-05-30 22:44:44
    b.f(x)=x^3-2x^2+x+18
    =(x+2)(x^2-4x+9)
    Discriminant of x^2-4x+9 is -20
    So f(x) has only one x intercept. Disagree with the claim
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