Question

show that x+2 is a factor of x^4-x^3-12

Answer 1

x+2=0

x=-2

p(x)=x^4-x^3-12

p(-2)=(-2)^4-(-2)^3-12

p(-2)=16+8-12

p(-2)=12

so x+2 is not a factor

Answer 2

Step-by-step explanation:

if x+2 is a factor then p(-2)=0

p(-2)=16+8-12

=24-12

=12 not equal to 0

therefore x+2 is not a factor of this equation