Question

If -1 is a zero of the polynomial, p(x) = x2 – 2x -3, then the other zero is

(a) -3 (b) 3 (c) 0 (d) 1​

Answer 1

Answer:

p(-3)=-3×2-2×(-3)-3

=-6+6-3

=0-3

-3

p(3)=3×2-2×3-3

=6-6-3

=0-3

=-3

p(0)=0×2-2×0-3

=0-0-3

=-3

p(1)=1×2-2×1-3

p(1)=2-2-3

p(1)=0-3

-3