Question

Can someone help me find the inverse of this function Let f(x)=x^2-10x+7. Find f(-2).

Answer 1

f(-2)= (-2)^2-10(-2)+7
f(-2)= 31

Answer 2

You can find the inverse of a quadratic function by completing its square. Are you familiar with the method of completing the square?

Answer 3

Yes i known how to do that method but im not aloud to do it

Answer 4

Plug in x for y and then solve for y to find the inverse.
Then plug in -2 for x.

Answer 5

you're correct! @Brittany122824

Answer 6

f(-2)= (-2)^2-10(-2)+7
f(-2)= 31

You need to find the inverse function, right?

Answer 7

yes i did that part but it once the inverse method and i dont no how to do it

Answer 8

OK, I do it this way: Change every x and y and then isolate y.

Answer 9

can you show me how

Answer 10

And then you isolate y :)