Помогите с алгеброй плиз

Question

Помогите с алгеброй плиз

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Answer 1

1
1)(y+3)/(y-3)-y²/(y-3)(y+3)=(y²+6y+9-y²)/(y-3)(y+3)=(6y+9)/(y-3)(y+3)=
=3(2y+3)/(y-3)(y+3)
2)(y+3)/(2y+3)*3(2y+3)/(y-3)(y+3)=2/(y-3)
2
4a^4b³ * (a+b)³/8a^9=b³(a+b)³/2a^5