Question

VALENDO 50 PONTS PRA HJ



1-2/3ab²-ab²+1/3 ab²+1/2ab² =

2- A= x²-2x
B= -3x²+5x-4
C=3x²-x-1

3A-B-C=

(*3 vezes o A*)

3- x+y+2x+y/3+2y+x=

Answer 1

2/3ab²-ab²+1/3ab²+1/2ab²=  ab²( 2/3-1+1/3+1/2)
(4/6-6/6+2/6+3/6)ab² = 3/6ab² ou 1/3ab² simplificando a fraçao

A= x²-2x      B=-3x²+5x-4    e    C= 3x²-x-1

3(x²-2x)-(-3x²+5x-4)-(3x²-x-1)
3x²-6x+3x²-5x+4-3x²+x+1=  3x²-10x+1

c) x+y+2x+y/3+2y+x=   (x+2x+x)+(y+2y+y/3)
4x+(3y+y/3)= 4x+(9y/3+y/3)= 4x10y/3