X(49x^2+14x+1)=0
x(7x+1)^2=0
x=0
7x+1=0
x=-1/7
150^(3/2) / 6^(3/2)= (150 : 6)^3/2= 25^(3/2)= (5^2)^3/2 =
= 5^(2 * 3/2) = 5^ 3 = 125
5х-у=4
-у=4-5х
у=4+5х
-2х+у=5
у=5+2х
X ≠ 1,
X>0
Y>0
Это свойства показательной функции
1) (58 4:15 + 56 7:24): 0,8 +2 1:9 *0,225: 8 3:4*3:5 = (874:15+ 1351:24): 2/5 + 19 : 9*9 : 40 : 35 : 4*3 : 5= (41241/360: 2/5 + 19/40) / 21/4 = (41241/144+ 19/40) / 21/4 = 68849/240 : 21/4= 68849/1260= 54 809/1260
2) (7 1/9 - 2 14/15) : (2 2/3 + 1 3/5) - (3/4-1/20) * (5/7 - 5/14) -48 = (64/9 - 44/15): (8/3 + 8/5) - 7/10*5/14 - 48 = 564/135 : 64/15 - 1/4 - 48 = 47/48 - 1/4 -48 = 35/48 - 48 = - 47 13/48