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Sagot :

5x - 5 + 10 - 5x = -5 + 10 =5



5(x-1)(2-x)
5(2x-x²-2+x)
10x-5x²-10+5x
-5x²+15x-10

(x²+x-3)(2x-3)
2x³-3x²+2x³-3x-6x+9
4x³-3x²-9x+9

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