# Example 1 - Graph Sketching

Example 1

Express $y=5+4x-{x}^{2}$   in the form $y=a-{\left(x+b\right)}^{2}$   , where a, b, and c  are constants. Hence state the maximum  value of y and the value of x at which it occurs. Sketch the curve $y=5+4x-{x}^{2}$   .