2)Reduza as expressões algébricas ao termo semelhante:
A) x+2y+3x-10y+5xy
B)10x-2y-6xy+2ay
C)2xy+4xy-6xy+2ay
D)3xy-2xy+10xy-2xy+17xy
E)10x(2+7)-10xy-2x-3
F)3(x+y-c)+4(x+3y-c)
A) x+2y+3x-10y+5xy
B)10x-2y-6xy+2ay
C)2xy+4xy-6xy+2ay
D)3xy-2xy+10xy-2xy+17xy
E)10x(2+7)-10xy-2x-3
F)3(x+y-c)+4(x+3y-c)
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Resposta:
A) x+2y+3x-10y+5xy
= x+3x+2y-10y+5xy
= 4x - 8y + 5xy
B)10x-2y-6xy+2ay
10x - 2y - 6xy+ 2ay
C)2xy+4xy-6xy+2ay
= 6xy - 6xy + 2ay
= 0xy + 2ay
= 2ay
D)3xy-2xy+10xy-2xy+17xy
= 26xy
E)10x(2+7)-10xy-2x-3
= 20x + 70x - 10xy -2x-3
= 20x+70x-2x-10xy-3
= 88x - 10xy -3
F)3(x+y-c)+4(x+3y-c)
= 3x + 3y - 3c + 4x + 12y - 4c
= 3x + 4x + 3y + 12y - 3c - 4c
= 7x + 15y - 7c