6a^2-6a=6a(a-1)
всё...............
#1
2a²-4ab-a+2b=(2a²-a)+(-4ab+2b)=a(2a-1)-2b(2a-1)=(2a-1)(a-2b)
#2
125^8/(5³*25^10)=(5³)^8/(5³*(5²)^10=5^24/(5³*5^20)=5^24/5^23=5
2). y= -5*(-0,8)+1,2=4+1,2=5,2. 3). 0,2x-3,6= -2,4; 0,2x=1,2; x=1,2/0,2=6.
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