Question

Q15. If the zeroes of the cubic polynomial f(x) = kx - 8x2 + 5 are a - B, a and a + B, then find the value of k.
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Answer 1

Answer:

let the value of x be 2

therefore,

f(x)=kx-8*2+5

=k(2)-16+5

=2k-11

-2k = -11

-=- cut

therefore, the value of k is 11/2 or 5.5