Question

решите номер 119.1,3,5,7

Answer 1

1)  = 5 ху
3) =4а^2b^2/ 4a^2 b^2 = 1
5) = -a^8b^12c^4 / abc = -a^7b^11c^3
7) 2x(4-6y+5x) / -2x = - (4 -6y +5x) = 6y -5x -4