Question

Find the real zeros of f (x) =45x -5x^3

Answer 1

We will have the following:

`f(x)=45x-5x^3\Rightarrow f(x)=-5x(x^2-9)`
`\Rightarrow f(x)=-5x(x-3)(x+3)`

So, its zeros are x = -3, x = 0 & x = 3.