factor the polynomial 3x^3+3x^2-126x if the polynomial is not factorable write prime

Question

please provide steps and if it is prime or not

Answer 1

It is factorable!

 

3x^3 + 3x^2 - 126x 

 

3x is common

 

so, polynomial is factored into -- 3x(x^2 + x - 42) = 3x(x + 7)(x - 6)