Find, in the form y=ax2+bx+c, the equation of the quadratic whose graph:
(1) cuts the x-axis at 5 and 1, and passes through (2,−9)
(2) cuts the x-axis at 2 and −21, and passes through (3,−14)
(3) touches the x-axis at 3 and passes through (−2,−25)
(4) touches the x-axis at −2 and passes through (−1,4)
(5) cuts the x-axis at 3, passes through (5,12), and has axis of symmetry x=2
(6) cuts the x-axis at 5, passes through (2,5), and has axis of symmetry x=1