Решите номер 119.1,3,5,7

Question

Решите номер 119.1,3,5,7

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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

Answer 2

1)=5xy
3)=1
5)=-a^7b^11c^3
7=-4+6y-5x