Question

if the polynomial x cube minus x square - 13 x + b has X - 1 and x plus 3 as a factor the values of A and B are​

Answer 1

Answer:

let x=1

p (x)= 1cube -1 square-13 (1)+b

1-1-13+b

-15+b=0

b=15

let x=-3

p (x)=-3cube-(-3)square- 13 (-3)+b

-27-9+39+b

-36+39+b

3+b=0

b=3