Question

We have a polynomial P(x)=-3xcube +kx square-8x+10
2 is a zero of p(x)
Find k.

Answer 1

Answer:

k=9/2 or 4.5

Step-by-step explanation:

Answer 2

Answer:

$\frac{15}{2}$

Step-by-step explanation:

plugging x = 2 in p(x) , we get

p(x) = 0

-3(2)^3 + k(2)^2 -8(2) +10 = 0

4k -20 = 0

k =15/2