kak tolong dijawab!!!

aljabar

A.  4a/5 - 2a/ 5 = (4a - 2a)/5 = 2a/5

B. 3/(4a) + 1/(2a) = 3/(4a) + 2/(4a) = (3 +2)/(4a) = 5/(4a)

C. (2a +5)/6 + (x-3)/4 = 2(2a +5)/ 12 + 3(a -3)/12
= (4a +10 + 3a - 9) / (12)
= (7a + 1)/ (12)

D.
= {(ax+1)(x-1) - 3(x)(x+2)}/(x(x+2)(x-1)
= (ax² - ax + x +1 - 3x² -6x)/ (x)(x² +x -2)
= {(a-3)x² - (a-5)x + 1 } /(x³ + x² + 2x)

E.
(4x² -16)/(x²  - 2x) = (2x -4)(2x +4)/ x(x -2)
= 2(x -2)(2x+4)/(x)(x-2)
= 2(2x +4)/(x)
= (4x +8)/(x)

F.
(8x - 8y)/ 16x -16y =
8(x -y)/ 16(x-y)
= 8/16 = 1/2

G.
(x² -16)/(x² +18x + 16)=
(x - 4)(x + 4)/ (x² +18x + 16)