2 Simplifier les expressions: 1)x+58 2)xxI=..... 3) r²¹xx= 4)-x1²= X 3 Développer: 1) k(a+b)= 2) 3(x+3) = = 3)-5(2-9x) = 4)-8(4+8²) 4 5) xx = 6) x- 7)x+1= 5) r³ x ***** Développer les expressions suivantes : A=(-5)(x-7) B=(x+7) C=2(3-1) D=(-3r+5) E=8(-5x+7) Développer les expressions suivantes: A=3(x-8) B=(3-2)(x+7) C=(5-22) (3-1) D= (2+z)(3x + 5)​
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