4^x - 2^x+3 + 12 = 0
2^2x - 2^x * 2^3 + 12 = 0
2^2x - 8 * 2^x + 12 = 0
Обозначаем 2^x = y
y^2 - 8y + 12 = 0
y1 = 6; y2 = 2
x1 = lg2 6
x2 = 1
4^x - 2^x+3 + 12 = 0
2^2x - 2^x * 2^3 + 12 = 0
2^2x - 8 * 2^x + 12 = 0
Обозначаем 2^x = y
y^2 - 8y + 12 = 0
y1 = 6; y2 = 2
x1 = lg2 6
x2 = 1