Jawabanmu

2014-09-11T05:11:19+07:00
A. A-B
= (-2x+y) - (3x-4y)
= -5x+4y
b. A+B
= (-2x+y) + (3x-4y)
= x-3y
c. B-A
= (3x-4y) - (-2x+y)
= 5x-5y
2 5 2
2014-09-11T05:14:20+07:00
A. -2x + y - 3× - 4y = -2× +(-3×)+y-4y= -5× +( -3y )
b. -2× + y + 3× - 4y = -2× + 3× + y -4y = 1× + (-3y)
c. 3x - 4y - (-2×) + y = 3× - 4y + 2× +y = 3× + 2× -4y + y = 5× - 3y
2 5 2