Question

X cube minus 3 x square - 9 x minus 5 divided by X + 1

Answer 1

f(x)=x³-3x²-9x-5

g(x)=x+1=0

=x=-1

f(-1)=(-1)³-3(-1)²-9(-1)-5

=-1-3+9-5

=0

So, f(x) is completely divisible by g(x)