Question

Factorise: x³+13x²+31x-45 given that x+9 is a factor​

Answer 1

Answer:

Let f(x) = x3 + 13x2 + 31x − 45 be the given polynomial. Therefore (x +9) is a factor of the polynomial f(x). Hence ( x - 1),(x + 5) and (x + 9)are the factors of polynomial f(x).