<span>(а-4)^2+(а-4)(а+4)+8а=а^2-8а+16+а^2+8а-16=2а^2</span>
12-9+10=13,6+9-5=10,18-5+4=9,60-10+50=0,60-10+50=100,100-50-30=80,3+14-7=10,18-3+5,5+6-7=4
Вычислите рациональным способом 11,101 - (5,4 + 0,101) (9,5+1,8+1,39)+0,5+(0,61+5,2) (5,781+9,37)-4,781 (3,23+8,596)+8,77 8,123-
zloy tapok
1) 11.101 - 5.4 - 0.101 = 11 - 5.4 = 5.6
2) 9.5 + 1.8 + 1.39 + 0.5 + 0.61 + 5.2 = (9.5 + 0.5) + (1.8 + 5.2) + (0.61 + 1.39) = 10 + 7 + 2 = 19
3) 5.781 + 9.37 - 4.781 = 10.37
4) 3.23 + 8.596 + 8.77 = (3.23 + 8.77) + 8.596 = 20.596
5) (8.123 - 2.123) - 1.8 = 6 - 1.8 = 4.2
Не благодари ;)