Find The Inverse Functionƒ(x) = x^2 + 49x – 40
The inverse function of f(x) is 0.21. To find this, you first rename the f(x) as y, then you will have it as y=49x+x^2-40. Take y=50x^2-40 which equals to 0.21 which will fall on the x axis. You can find the examples on http://people.richland.edu/james/lecture/m116/functions/inverses.html.
Y=x^2+49x-40. Inverse: x=y^2+49y-40. Now solve for y by completing the square! Good Luck!