What is the answer and how to get the answer

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Given the quadratic function f(x)=3x^2-24x+49 a. use “completing the squares” to convert the quadratic function into vertex form b. state the vertex c. find the x and y intercepts d. graph the function

I’m confused on how to work the pie charts