Question

-If x + 2 is a factor of
(x + 1)⁷+ (2x + K)³, K being real then
K
​

Answer 1

Answer:

f(x)=(x+1)

7

+(2x+k)

3

if (x+2) is a root then placing x=−2,f(x)=0

∴f(x)=0(−2+1)

7

+(2x(−2)+k)

3

(−4+k)

3

=−1 ⇒−4+k=−1

k=3