2 Simplifier les expressions : 1)x+5x = ..... 2) x x x = ..... 3) x² × x = .. 1 4)-xx²= X ***** 3 Développer : 1) k(a + b) = 2) 3(x+3) = . 4 ****** 3) -5(2-9x) 4)-8(4+8x²) = 5 ***** =... -..... 4 5) x x - 6) x- = 2 7) X÷x = ..... ***** 8) x³ x== X Développer les expressions suivantes : A = (-5)(x-7) B = x(x + 7) ***** Développer les expressions suivantes : C = 2x(3x - 1) A = 3(x-8) B= (3-x)(x+7) D = x(-3x + 5) C=(5-2x) (3x - 1) E = 8(-5x+7) D = (2+x)(3x + 5)​
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