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

Question

anonymous · Answer

its inverse fails to be a function

anonymous · Answer

as for f(-2) just plug -2 in for x and evaluate

anonymous · Answer

than can you give me an equation that would be a fuction

anonymous · Answer

yes i did that but what does it mean by inverse

anonymous · Answer

The graph would be a parabola

anonymous · Answer

that's why it doesn't pass the vertical line test and it's not a function

anonymous · Answer

horizontal* line test

anonymous · Answer

it means you need to switch x and y and solve for y

anonymous · Answer

well that can you give me a function @master50777

anonymous · Answer

ok @sourwing  but you are saying this is not a function so can you give me one

anonymous · Answer

switch x and y,
x = y^2 - 10y + 7

solve for y

anonymous · Answer

so the answer would be 23 @sourwing

anonymous · Answer

no

anonymous · Answer

than what would it because thats what i got

anonymous · Answer

I think its f-^1(x)=5+√x+18 5−√x+18