Jawabanmu

2014-09-04T19:35:47+07:00
A= -7x+5
B = 2x-3

A-B = -7x + 5 -(2x-3)
 = -9x +8

2014-09-04T19:37:30+07:00
A= -7x+5
B= 2x-3
A - B = (-7x+5) - (2x-3)
         = -5x+2