Question

What polynomial has roots of -6, -4, and 1?
A. x^3 -9x^2 -22x +24
B. x^3 -x^2 -26x -24
C. x^3 +x^2 -26x +24
D. x^3 +9x^2 +14x -24

Answer 1

for this kind of problem Hit and Trial method is most suitable one so put values in each option and test if it become zero(0) or not.

Answer 2

Would doing (x+6)(x+4)(x-1)=0 work for this one?

Answer 3

Yes that would be the way I would go about doing it, and then just factor them all into one polynomial

Answer 4

@heybhai If you don't have a calculator on the test it would be pretty difficult doing that.

Answer 5

very true @Arfney it is sometime tedious so must be kept as last option when nothing works