Question

Find all the zeros of the
`y = x^2 - x - 20` quadratic function

Answer 1

TO find the zeros of a quadratic function we should factorize the function

`x^2-x-20=(x-)(x+)`

So we have to find numbers that multiplied are -20 and added are -1. So we get -5 and 4

`x^2-x-20=(x-5)(x+4)`

so the zeros of the function are 5 and -4