1) (x - 2)^2 - (x + 3)^2 = 5
(x - 2 + x + 3)(x - 2 - x - 3) = 5
(2x + 1)*(-5) = 5
2x + 1 = -1
2x = -2
x = -1
Ответ: -1.
2) (3 - x)^2 - (x + 4)^2 = 7
(3 - x + x + 4)(3 - x - x - 4) = 7
7*(-1 - 2x) = 7
-1 - 2x = 1
-2x = 2
x = -1
Ответ: -1.
3) (2x + 1)^2 - 8 = (3 - 2x)^2
(2x + 1)^2 - (3 - 2x)^2 = 8
(2x + 1 + 3 - 2x)(2x + 1 - 3 + 2x) = 8
4*(4x - 2) = 8
4x - 2 = 2
4x = 4
x = 1
Ответ: 1.
4) (1 - 3x)^2 - 12 = (3x + 5)^2
(1 - 3x)^2 - (3x + 5)^2 = 12
(1 - 3x + 3x + 5)(1 - 3x - 3x - 5) = 12
6*(-6x - 4) = 12
-6x - 4 = 2
-6x = 6
x = -1
Ответ: -1.
5) (x^2 - 2)^2 - (x^2 - 6)^2 = 0
(x^2 - 2 + x^2 - 6)(x^2 - 2 - x^2 + 6) = 0
(2x^2 - 8)*4 = 0
2x^2 - 8 = 0
2x^2 = 8
x^2 = 4
x = +-2
Ответ: -2; 2.
6) (3 - x^2)^2 - (5 - x^2)^2 = 0
(3 - x^2 + 5 - x^2)(3 - x^2 - 5 + x^2) = 0
(8 - 2x^2)*(-2) = 0
8 - 2x^2 = 0
2x^2 = 8
x^2 = 4
x = +-2
Ответ: -2; 2.