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x²+2x-3 (x+3)(x-1)
=(3x-9)
(x-1)
2x-5x-12=(2x+3)(x-4)
x²-16 (x-4)(x+4)
=(2x+3)
(x+4)
-x²-2x+35=(x-7)(x+5)
x²-25 (x+5)(x-5)
=(x-7)
(x-5)
3b-bx=b(3-x)
cx-3c c(x-3)