А)2х. 7х² ---- + --- х-у х²-у² Б) 3а-6ав. 2а²в ----------- • ------- а⁴в³ 1-4в²

Question

А)2х. 7х²
---- + ---
х-у х²-у²


Б) 3а-6ав. 2а²в
----------- • -------
а⁴в³ 1-4в²

Answer 1

1
2x/(x-y)+7x²/(x-y)(x+y)=(2x²+2xy+7x²)/9x²-y²)=(9x²+2xy)/9x²-y²)
2
3a(1-2b)/a^4b³ *2a²b/(1-2b)(1+2b)=6/ab²(1+2b)