Question

Find all the zeros of the polynomial x cube + 3 x square - 4 x minus 12 if one of its zeros is -3

Answer 1

Answer:

You said one of a zero is -3 so,

p(-3)=x³+3x²-4x-12

p(-3)=(-3)³+3(-3²)-4(-3)-12

p(-3)= 3(-9)-27+12-12

p(-3)= -27-27

p(-3)= -54