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

Question

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

anonymous · Answer

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

miracrown · Answer

you're correct! @Brittany122824

miracrown · Answer

f(-2)= (-2)^2-10(-2)+7
f(-2)= 31

You need to find the inverse function, right?

anonymous · Answer

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

miracrown · Answer

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

anonymous · Answer

can you show me how

miracrown · Answer

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And then you isolate y :)