Question

Find k if the remainder is 12 when x^3+12x^2+kx+72 is divided by (x+3)

Answer 1

Answer:

k=47

Step-by-step explanation:

given

x+3 can be divide x+3=0

x=-3

by substituting x=-3 in above equation

(-3)^3+12×(-3)^2+k(-3)+72 =12

-27+108-3k+72=12

153-12=3k

141=3k

k=141/3

k=47