1) - 8•( 3/16х - 5/8y ) = - 3/2x + 5y = - 1,5x + 5y
2) ( -3 )•( - 2/9x - 5/6 ) = 2/3x + 5/2
3) - 1,5x + 5y - ( 2/3x + 5/2 ) = - 1 1/2x + 5y - 2/3x - 2,5 = 5y - 1 3/6x - 4/6x - 2,5 = 5y - 1 7/6x - 2,5 = 5y - 2 1/6x - 2,5
а). 3x*(x^2+3xy-4); б) (5x+5y)+(ax+ay)=5*(x+y)+a*(x+y)=(x+y)*(5+a).
1\26: 1\2=1,05
1,05-1,5= - 0, 45
- 1 1\9: 3\20= - 1 1\9
- 9\20:(-1 1\9)=1\2
Ответ: 1\2 или 0,5
= m - 2m^2 n^2 - n
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m^2