13
8
0
2
11
))))))))))))))))))))))))))
75² (3*25)² 3² * 25² 9*25*5*5 5
-------- = ---------- = ------------- = -------------------- = ------- = 5/81
45³ (9*5)³ 9³* 5³ 9²*9*5* 25 9²
6х-12y-3x+3y=0
3x-9y=0
3*10,7-9*7,7=32,1-69,3=-37,2
32 - 4X = X^2
X^2 + 4X - 32 = 0
D = 16 + 128 = 144 ; V D = 12
X1 = ( - 4 + 12 ) : 2 = 4
X2 = ( - 16 ) : 2 = ( - 8 )