If x=-2 is root of the polynomial f(x)=2x³-3x+7a=? – InterviewSolution

1.

If x=-2 is root of the polynomial f(x)=2x³-3x+7a=?

Answer»

Answer:

a = 10/7

Step-by-step explanation:

If X = -2, then,

$f( - 2) =2 {( - 2)}^{3} - 3( - 2) + 7a = 0$

$- 16 + 6 + 7a = 0$

$7a = 10$

$a = \frac{10}{7}$

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