Question

If -1 is a zero of the polynomial f(x) = x square - 2x - 3 then the other zero is?

Answer 1

Answer:

X^2 - 3x+x-3

X(x-3)+1(x-3)

=(x-3)(x+1)

The other zero is 3

Answer 2

Answer:

i think it's 3

Step-by-step explanation:

so  to do this sum it's really very easy if u know the correct formula

so for any question of this type u can just use this formula which that u just have to put the question in a linear equation.

like here we put it as x^2 - 2x - 3 = 0

if u solve it u will get x=3

now coming back to our question , here as v have found out that x=3 we can now try finding zero of the polynomial.

so     f(3)= 3^2 - (2x3) - 3

              = 9 - 6-3 = 9 - 9

               =0

hence u have ur zero of the polynomial

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