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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 7: Cho hàm số y = f(x) = x² – 4,5. Tính f(2); f(0); f(-2)

Toán Lớp 7: Cho hàm số y = f(x) = x² – 4,5. Tính f(2); f(0); f(-2)

Comments ( 2 )

  1. $\text{f(x)=x²-4,5}$
    $\text{+f(2)}$
    $\text{f(2)=2²-4,5=4-4,5=-0,5}$
    $\text{+f(0)}$
    $\text{f(0)=0²-4,5=0-4,5=-4,5}$
    $\text{+f(-2)}$
    $\text{f(-2)=(-2)²-4,5=4-4,5=-0,5}$
    $\text{Vậy ….}$

  2. y= f(x)= x²-4,5
    f(2)= 2²-4,5
    = 4-4,5
    = -0,5
    f(0)= 0²-4,5
    = 0-4,5
    = -4,5
    f(-2)= (-2)²-4,5
    = 4-4,5
    = -0,5
    #namOvO

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222-9+11+12:2*14+14 = ? ( )

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