а) x + 4 = 2x - 1
-x = - 5
x = 5
б) x - 3 = 2^4
x - 3 = 16
x = 19
c) (x - 1)(x - 2.5) = 1
x^2 - 3.5 + 1.5 = 0
x1 = 3; x2 = 1/2
г) x^2 - 2x + 4 = 2x^2 + 5x + 10
x^2 + 7x + 6 = 0
Свойство квадратных уравнений:
b = a + c => x1 = -1; x2 = -6
а) x + 4 = 2x - 1
-x = - 5
x = 5
б) x - 3 = 2^4
x - 3 = 16
x = 19
c) (x - 1)(x - 2.5) = 1
x^2 - 3.5 + 1.5 = 0
x1 = 3; x2 = 1/2
г) x^2 - 2x + 4 = 2x^2 + 5x + 10
x^2 + 7x + 6 = 0
Свойство квадратных уравнений:
b = a + c => x1 = -1; x2 = -6