The graph of the quadratic function in standard form, f(x) = ax² + bx + c, is a ... f(x)= (3x – 5)(7x – 13); y = (5x – 7)(6x – 5) ... Intercept form: y = 9(x - 2/3 + √3/3)(x - 2/3 - √3/3) = (3x – 2 + ... Find p and q to convert f(x) to the Vertex Form: f(x) = a*(x + p)² + q ... Solution. y = 5*(x² - 8x/5 + 2/5) = 5(x –4/5)² – 16/5 + 2.