Question

How do you find all zeros of the function `f(x)=-2x^2+2x+4`?

Answer 1

`f(x)` has zeros `2` and `-1`

Explanation:

`f(x) = -2x^2+2x+4=-2(x^2-x-2)=-2(x-2)(x+1)`

Hence the zeros of `f(x)` are `x=2` and `x=-1`