Développe et reduis quand ces possible les expressions suivantes : 2*(a+3)= (2-y)*5= -2x(3x-2)= (x-4)*3x= 10+3(x-5)=
4a-(4+3a)= 4y-3y(1+3y)= (2y+1)(3-4y) 4(5y-3)-(10y+1)(2y-4)
4a-(4+3a)= 4y-3y(1+3y)= (2y+1)(3-4y) 4(5y-3)-(10y+1)(2y-4)
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