Bonjour a tous je dois developpper puis réduire ces expressions et je n'y arrive pas .Aidez moi s'il vous plait !!! merci d'avance A=3(x+2)-x+1 ___B=-4(+3x-1)-(4x+7) ____C=-7(-x+3)+3(x+2)+2(x-1____ D=x(x-5)-2(3+x) ____E=-3(2x+4)-x(2-3x) ___F=-3(x au carré +7)+(6x-1)-x(&5+7x)-3
A= 3(x+2) -x+1 = 3x+6-x+1 = 2x+7
B= -4(3x-1)-(4x+7) = -12x+4-4x-7 = -16x-3
C= -7(-x+3)+3(x+2)+2(x-1) = 7x-21+3x+6+2x-2 = 12x-17
D= x(x-5)-2(3+x) = x²-5x-6-2x = x²-7x-6
E= -3(2x+4)-x(2-3x) = -6x-12-2x+3x² = 3x²-8x-12
F= -3(x²+7)+(6x-1)-x(5+7x)-3 = -3x²-21+6x-1-5x-7x²-3 = -10x²+x-25
A = 3x+6 -x+1
A = 2x +7
B = 12x+4 - 4x-7
B = 8x-3
C = 7x -21 +3x+6+2x-2
C = 12x -17
D = x^2 - 5x-6-2x
D = x^2 -7x-6
E = -6x-12 -2x+3x^2
E = 3x^2-8x-12
F = -3(x^2+7) +(6x-1)-x(5+7x)-3
F = -3x^2 -21 +6x-1 -5x -7x^2 -3
F = -10x^2 -x-25
