The following expressions are equivalent to 15x33210935 whic

The following expressions are equivalent to -15(x-33)²+10935 which is called the transformation/vertex formfor quadratic polynomials.
a.) -15(x-6)(x-60)
b.) -15x²+990x-5400

Question: Which expression (a) or (b) shows the y-intercept most clearly?

Solution

Expression b is of the form ax^2 + bx +c where c is the y intercept . Therefore expression second shows the y intercept more clearly .