Q. 24.4( 8 Votes )

# The value of k for which the polynomial x^{3} - 4x^{2} + 2x + k has 3 as its zero, is

A. 3

B. -3

C. 6

D. -6

Answer :

If 3 is the solution for the equation. It must satisfy the expression.

So, putting x = 3 it must be zero.

33 - 4 × 32 + 2 × 3 + k = 0

27 – 4 × 9 + 6 + k = 0

k - 3 = 0

k = 3

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