Question

x+3 completely divides x^3+5x^2-k, the value of k

Answer 1

Answer:

k = 18

Step-by-step explanation:

Since x + 3 divides completely,

Substitute x = - 3 in the given expression.

f(-3) = (-3)^3 + 5(-3)^2 - k = 0

= - 27 + 45 - k = 0

= 18 - k = 0

Hence, k = 18

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