Question

Efetue as opeações:

A) 3xy - xy - 2xy D) 1/2x - 1/3x

B) 15x - 3x - y + 2x E) - 7/2 a + 1/4 a

C) 3a - 8a + 4a - 5a - a F) 2m - 3/4m

Answer 1

a) 3xy-xy-2xy
2xy-2xy=0
b)15x-3x-y+2x
12x+2x-y
14x-y
c)3a-8a+4a-5a-a
-5a+4a-5a-a
-a-5a-a
-7a
d)1/2x -1/3x mmc é 6
3/6x-2/6x
1/6x
e)-7/2a + 1/4a mmc é 4
-14/4a + 1/4a
-13/4a
f)2m - 3/4m mmc é 4
8/4m -3/4m
5/4m