Объяснение:
(2y-5)2+(3y-5)×(3y+5)+40
4y2-20y+25+(3y-5)×(3y+5)+40
4y2-20y+25+9y2-25+40
4y2-20y+9y2+40
13y2-20y+40
Объяснение:
(2y-5)2+(3y-5)×(3y+5)+40
4y2-20y+25+(3y-5)×(3y+5)+40
4y2-20y+25+9y2-25+40
4y2-20y+9y2+40
13y2-20y+40
13y2-20y+40