x2+2x-63 = (x-7)(x+9) when factored
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-x(x2 - 2)(x2 + 3)
Take out the common factor, 3: 3x + 6 = 3(x + 2).
x2-3x+2.25 is the same as 4x2-12x+9 and is (2x-3)(2x-3) when factored
(x+2)(x2+2x+4)
4x2 + 8x + 4 = 4 (x2 + 2x + 1) = 4 (x + 1)2