1
а)=3х/2у
б)=5у/у(у-2)=5/(у-2)
в)=(a-b)(a+b)/3(a-b)=(a+b)/3
2
a)=(3a-2a²-2+2a²)/2a²=(3a-2)/2a²
б)=(3x-y-3x-y)/(9x²-y²)=-2y/(9x²-y²)=2y/(y²-9x²)
в)=(3b-4+3b)/b(b-2)=(6b-4)/(b²-2b)
3
=(x-6y²+6y²)/2y=x/2y=-8/0,2=-40
4
=(2x²+8x-x²-8x-x²+16)/x(x²-16)=16/)x³-16x)