Pelajaran Aljabar bro. Tolong dibantu ya... :)

1).
3/(x+1) + 3/(x-1)
=[3(x-1) + 3(x+1)] / (x²-1)
=[3x-3 + 3x+3] / (x²-1)
=6x / (x²-1)

2).
x/(x+y) + x/(x-y)
=[x(x-y) + x(x+y)] / (x²-y²)
=[x²-xy + x²+xy] / (x²-y²)
=2x² / (x²-y²)