Question

Find the inverse of f(x)=x-5x^2 , x is greater than or equal to 1

Answer 1

\[y=-5x^2+x \\ 0=-5x^2+x-y \\x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \text{ where we have the form } y=ax^2+bx+c\]

Answer 2

Thanks :)