Tolong dong kalo ini caranya gimana

1/x + 1/y = (y+x)/xy
1/x - 1/y = (y-x)/xy
maka jadinya
= {(y+x)/xy} / {(y-x)/xy}
= (y + x)/xy × xy/(y - x)
= (y + x) / (y - x)
= (x + y) / (-x + y)
= (x + y) / -(x - y)
= -(x + y) / (x - y)
pilihan B