if zero of x3 -3×2+x+1 are a-b,a,a+b, then find the value of a2​

if zero of x3 -3×2+x+1 are a-b,a,a+b, then find the value of a2​

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Aubrey

2 thoughts on “if zero of x3 -3×2+x+1 are a-b,a,a+b, then find the value of a2​”

  1. Step-by-step explanation:

    [tex] {x}^{3} – 3 {x}^{2} + x + 1 \\ \alpha = a – b \: , \: \beta =a \: , \: \gamma =a+b \\ sum \: of \: zeroes: \\ \alpha + \beta + \gamma = \frac{-b}{a} \\ (a-b) + a + (a+b)=\frac{-b}{a} \\ 3a = \frac{ – b}{a} \\ {a}^{2} = \frac{ – b}{3} \\ {a}^{2} = \frac{ – ( – 3)}{3} \\ {a}^{2} = 1[/tex]

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  2. Step-by-step explanation:

    Correct option is

    D

    a=0,b=−6

    x

    2

    +(a+1)x+b is the quadratic polynomial.

    2 and −3 are the zeros of the quadratic polynomial.

    Thus, 2+(−3)=

    1

    −(a+1)

    =>

    1

    (a+1)

    =1

    =>a+1=1

    =>a=0

    Also, 2×(−3)=b

    =>b=−6

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