Question

How do you find all zeros of the function `f(x)=10x^2+5x-5`?

Answer 1

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

Explanation:

`f(x) = 10x^2+5x-5=5(2x^2+x-1)=5(2x-1)(x+1)`

Hence `f(x)` has zeros `x=1/2` and `x=-1`