Question

Решите уравнение/
Б) (y-2)(y²+2y+4)-y(y-3)(y+3)=1

Answer 1

у=1

(y-2)(y²+2y+4)-y(y-3)(y+3)=1

у³-8-у×(у²-9) =1

у³-8-у³+9у=1

-8+9у=1

9у=1+8

9у=9

у=1