Bonsoir,
SIMPLIFIER les expressions suivantes :
A= 8x+3(5)-y+2= 8x+15-y+2= 8x-y+17
B=9(x)(x)+3(2-5x) = 9x²+6-15x= 9x²-15x+6
C= 3xy+(5x-2)(7-7xx) = 3xy+35x-14-14x²-35x³= -35x³-14x²+3xy+35x-14
D= -6x-2(-5x+1)+y+xy = -6x+10x-2+y+xy= 4x++y+xy+2
E=(-3x+4y)(2xy+1)= -6x²y+8xy²-3x+4y