



 
Juan, Look at my note to another student on completing the square and use it to write y = x^{2 } 6x + 13 in the form y = (xa)^{2 }+ b. Solve this equation for x by writing (xa)^{2} = y  b and taking the square root of both sides. This gives two solutions
and
To decide which is the inverse of F(x) draw a sketch of y = x^{2}  6x + 13. You may find it helpful to use the form y = (xa)^{2 }+ b when constructing the graph. I hope this helps,  


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