Diketahui A=2xy-x dan B =2x+xy tentukan a.A+B, b.A-B, C.2A+5B, d.3B-5A”

A.2xy-x+2x+xy
=2x+y
B.2xy-2x+xy
=2x-y
C.2a+5b
=7ab
D.3b-5a
=-2ab
Semoga membantu. 🙂

A. A + B = 2xy -x + 2x +xy = 2xy +xy -x + 2x = 3xy +x
b. A-B = 2xy -x – 2x + xy = 2xy +xy -x – 2x = 3xy -3x
c. 2A + 5B = 2(2xy -x) + 5(2x+xy) = 4xy -2x + 10x + 5xy = 4xy +5xy -2x + 10x =                      9xy + 8x
d. 3B – 5A = 3(2x+xy) – 5(2xy -x) = 6x + 3xy -10xy + 5x = 6x + 5x +3xy -10xy =                         10x -7xy