How do I use the vertex formula to determine the vertex of the graph of the function and write it in standard form for f(x)=x^2-10x
To determine the standard form of f(x)=x^2-10x the book answer has (x-5)^2-25 but I don't see how the negative 25 plays out. Even if I square (x-5) I still come out with +25 at the end. Suggestions?
To determine the standard form of f(x)=x^2-10x the book answer has (x-5)^2-25 but I don't see how the negative 25 plays out. Even if I square (x-5) I still come out with +25 at the end. Suggestions?