Perkalian bentuk aljabar Dik: A=3x+5y B=4x-2y Dit: A=a+b B=a-b C=2a+b D=a-1/2b

A. a + b
= 3x+5y + 4x-2y
= (3x+4x) + (5y-2y)
= 7x+3y
B. a - b
= 3x+5y - 4x-2y
= (3x-4x) + (5y+2y)
= -x+7y
C. 2a + b
= (2)3x+5y + 4x-2y
= 6x+10y + 4x-2y
= (6x+4x) + (10y-2y)
= 10x+8y
D. a - ½b
= 3x+5y - (½)4x-2y
= 3x+5y - 2x-y
= (3x-2x) + (5y+y)
= x+6y