Question

25. Find the value of k for which the polynomial
x+ +10x3 + 25x2 +15x + k is exactly divisible
by x +7.​

Answer 1

Answer:

10x^3+25x^2+15x+k is exactly divisible by x+7.

Let p(x) =10x^3+25x^2+15x+k

therfore, p(-7)= 10*(-7)^3+25*(-7)^2+15(-7)+k=0

                      =-3430+1225-105+k=0

                       =-2310+k=0

                       =k= 2310

Step-by-step explanation:

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