Question

find k if X + 1 is a factor of PX is equal to x cube 3 - 3xsquare + kx​

Answer 1

let x+1=0

x=-1

p(-1)= -1^3- 3-1^2 +k×-1 =0

= -1 -3-k =0

= -4-k =0

=k=4

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