Question

5. If a – b, a and a + b are zeroes of the polynomial f(x) = 2x³ – 6x² + 5x – 7, then value of a is



(a) 1 (b) 2 (c) -5 (d) 7​

Answer 1

Answer:

(a−b),a,(a+b) are the zeros of 2x

3

−6x

2

+5x−7

Sum of zeroes =

(coefficient of x

2

)

−(coefficient of x)

a−b+a+a+b=

2

−(−6)

=3

⇒3a=3

⇒a=1

Answer 2

Step-by-step explanation:

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