Question

Tolong bantu !!!
jika A=-2x+y dan B=3x-4y, tentukan.
a.A-B
b.A+B
c.B-A

Answer 1

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

Answer 2

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