Question

(5+2y)(y-3)-2(y-1)^2=0

Answer 1

исходное не пишу
5у+2у²-15-6у-2у²+4у-2=0
3у=17
у=5 2/3

Answer 2

(5+2у)(у-3)-2(у-1)²=0
5у-15+2у²-6у-2(у²-2у+1)=0
5у-15+2у²-6у-2у²+4у-2=0
3у-17=0
3у=17
у=17/3