А) 15x^2 + 4 = 1615x^2 = 16 - 415x^2 = 12x^2 = 12 / 15x^2 = 4 / 5x = ±√(4 / 5)x = ±2 / √5x = ±2√5 / 5
Б) x^2 = 4x - 3x^2 - 4x + 3 = 0(x - 3)(x - 1) = 0x = 3 или x = 1
В) x - 5x^2 = 05x^2 - x = 0x(5x - 1) = 0x = 0 или x = 1/5
Г) 5x^2 - 20 = 05x^2 = 20x^2 = 20 / 5x^2 = 4x = ±√4x = ±2
Д) x^2 - 9x + 18 = 0(x - 3)(x - 6) = 0x = 3 или x = 6
А) 15x^2 + 4 = 16
15x^2 = 16 - 4
15x^2 = 12
x^2 = 12 / 15
x^2 = 4 / 5
x = ±√(4 / 5)
x = ±2 / √5
x = ±2√5 / 5
Б) x^2 = 4x - 3
x^2 - 4x + 3 = 0
(x - 3)(x - 1) = 0
x = 3 или x = 1
В) x - 5x^2 = 0
5x^2 - x = 0
x(5x - 1) = 0
x = 0 или x = 1/5
Г) 5x^2 - 20 = 0
5x^2 = 20
x^2 = 20 / 5
x^2 = 4
x = ±√4
x = ±2
Д) x^2 - 9x + 18 = 0
(x - 3)(x - 6) = 0
x = 3 или x = 6