Rewrite the following quadratic function f(x) =ax²+ bx + c in the form f(x) = a(x –h)² + k , then find
the value of a, h, and k
1. y = x² – 2x + 3
2. y = x² – 6x + 12
3. y = −3x² + 6x + 1
4. y = x²– 6x – 7
5. y = 15 – 7x – x²