3^(x^2-2xy)=1 (1)
2log3(y+2)=log3(5x-1) (2)
одз y + 2 > 0 y > -2
5x - 1 > 0 x > 1/5
первое (1) решаем
3^(x^2-2xy)=1
3^(x^2-2xy)=3^0
x^2-2xy = 0
x(x - 2y) = 0
x = 0 нет x > 1/5
x = 2y
подставляем в (2)
2log3(y+2)=log3(5*2y-1)
(y + 2)^2 = 10y - 1
y^2 + 4y + 4 - 10y + 1 = 0
y^2 - 6y + 5 = 0
D = 36 - 20 = 16
y12 = (6 +- 4)/2 = 5 1
y1 = 5 x1 = 10
y2 = 1 x2 =2
ответ (2,1) (10,5)
3^(x^2-2xy)=1 (1)
2log3(y+2)=log3(5x-1) (2)
одз y + 2 > 0 y > -2
5x - 1 > 0 x > 1/5
первое (1) решаем
3^(x^2-2xy)=1
3^(x^2-2xy)=3^0
x^2-2xy = 0
x(x - 2y) = 0
x = 0 нет x > 1/5
x = 2y
подставляем в (2)
2log3(y+2)=log3(5*2y-1)
(y + 2)^2 = 10y - 1
y^2 + 4y + 4 - 10y + 1 = 0
y^2 - 6y + 5 = 0
D = 36 - 20 = 16
y12 = (6 +- 4)/2 = 5 1
y1 = 5 x1 = 10
y2 = 1 x2 =2
ответ (2,1) (10,5)