Ответ:
Объяснение:
6.a =5x^2/3y
6б =(y-3x)(y+3x)/6x(3x-y)=-(3x+y)/6x
6в =(a(x-y)+3(x-y))/(a-3)(a+3)=(x-y)(a+3)/(a-3)(a+3)=(x-y)/(a-3)=(5,8-3,4)/(3,1-3)=
=2,4/0,1=24
7a x^2=36/49 x=+-6/7
7б 9x^2+16+24x-9x^2+1=65
24x=65-17
24x=48
x=2
8. 11*(27+73)+14*(27+73)=(11+14)(27+73)=25*100=2500