-0,3-6-1,5с-3=6,3-1,5с-3= 3,3-1,5*4=- 2,3
3,3-1,5*9=-10,2
4а³-4а²б-4аб²-а²+аб+б²+a²+aб-3б²-4а³-4а²б+12аб²=2б(4аб-4а²-б+а)
8аб²+2аб-2б²=8аб²-8а²б-2б²+2ба
8аб²+2аб-2б²-8аб²+8а²б+2б²-2ба
8а²б
31,5÷1,4-(3,5×4/2/5-3,4×3/1/2)×3/1/2=315:14-(3.5*2*5-3.4*3*2)*3*2=22.5-(3.5*10-3.4*6)*6=<span>22.5-(35-20.4)*6=22.5-14.6*6=22.5-87.6=65.1</span>
= (7t - t - p)(7t + t + p) =
= (6t - p)(8t + p)
1163
2) 0,25*1,6(0,25+1,6-0,85)=0,4*1=0,4
3) 5,12(9,76+5,36-5,12)=5,12*10=51,2
1164
2) 25⁴-125²=(5²)⁴-(5³)²=5⁸-5⁶=5⁵(5³-5)=5⁵(125-5)=5³ * 120=40*3*5³