Example 1
Express y=5+4x−x2 in the form y=a−(x+b)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−x2 .

Express y=5+4x−x2 in the form y=a−(x+b)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−x2 .


