Question

Find the value of k, if x+1 is factor of the polynomial -4x^3+4x^2+4x^2+4kx-k

Plz ans it fast bcz tommorow is my exam

Answer 1

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Answer 2

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× +1=0

×=-1

-4×-1^3 + 4×-1^2+ 4×-1 +4k×-1 -k

=-4^3 +4^2 -4-4k -k

=48+16 -4-4k-k

= 48+16-4-3k

=64-4-3k

=60-3k

60-3k=0

3k=60

k=60÷3

k=20

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