2х-5=27
2х=22
2х=22:2
х=11
Второе не могу
2х² + х - 3 = (х - 1)(2х + 3)
4y^3 - y =0
y(4y^2 - 1) = 0
y =0
4y^2 - 1 = 0
4y^2 = 1
y^2 = 1/4
y = 1/2
y = - 1/2
Ответ: y1 = 0, y2 = 1/2, y3 = - 1/2.
x^4 - x^2 = 0
x^2(x^2 - 1)=0
x^2 = 0
x = 0
x^2 - 1 = 0
x^2 = 1
x = 1
x = - 1
Ответ: x1 = 0, x2 = 1, x3 = - 1
9y^2 - 4y^4 = 0
y^2( 9 - 4y^2) = 0
y^2 = 0
y = 0
9 - 4y^2 = 0
- 4y^2 = - 9
4y^2 = 9
y^2 = 9/4
y = 3/2
y =- 3/2
Ответ: y 1 = 0, y2 = 3/2, y3 = - 3/2.
48х²/6х+4 - 8 = 48х²/6х+4 - 8(6х+4)/6х+4 = 48х²-48х-32/6х+4 = 12(4х²-4х-3)/2(х+2) = 6(4х²-4х-3)/х+2=24х²-24х-18/х+2