if -2 is a zero of f(x)= x^3+13x^2+32x+20,the find its other zero
Answers
Answered by
2
f(x)=x^3+13x^2+32x+20
Put x=-1
f(-1)=(-1)^3+13(-1)^2+32(-1)+20
f(-1)=-1+13-32+20
f(-1)=-33+33
f(-1)=0
x=-1 is a zero of polynomial p(x)
Put x=-1
f(-1)=(-1)^3+13(-1)^2+32(-1)+20
f(-1)=-1+13-32+20
f(-1)=-33+33
f(-1)=0
x=-1 is a zero of polynomial p(x)
Similar questions