Exercice 4: factoriser les expressions Pouvez me dire si j'ai fait des erreurs de calcule

R = 5(x+1)+(2x-6)(x+1)
=(x+1)(5(2x-6))
=(x+1)(5+2x-6)
=(x+1)(-1+2x)

T =7(x-4)+(x-4)(2x-7)
=(x-4)(7(2x-7)
=(x-4)(7+2x-7)
=(x-4)(-2x)

S =(2x-10)(5x-3)-(2x-10)(3x+4)
=(2x-10)((5x-3)-(3x+4))
=(2x-10)(5x-3-3x+4)
=(2x-10)(2x+1)

U =4(3x+11)-(3x+11)(6-4x)
=(3x+11)((4-(6-4x)
=(3x+11)(4-6-4x)
=(3x+11)(-2-4x)

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