Question

Factorise:x^4 + x^3 – 7x^2 – x+ 6​

Answer 1

Step-by-step explanation:

f(x)=x^4+x^3-7x^2-x+6

if x= -1

f(-1)=(-1)^4+(-1)^3-7(-1)^2-(-1)+6

=1+(-1)-7(1)+1+6

=1-1-7+7

=0