1) x^2 + 4x - 12 = 0(x + 6)(x - 2) = 0x + 6 = 0 => x = -6x - 2 = 0 => x = 2
Ответ: x = -6 или x = 2
2) x^2 - 6x + 8 = 0(x - 2)(x - 4) = 0x - 2 = 0 => x = 2x - 4 = 0 => x = 4
Ответ: x = 2 или x = 4
3) x^2 - 16x + 64 = 0(x - 8)(x - 8) = 0(x - 8)^2 = 0x - 8 = 0 => x = 8
Ответ: x = 8
4) x^2 - 13x + 42 = 0(x - 7)(x - 6) = 0x - 7 = 0 => x = 7x - 6 = 0 => x = 6
Ответ: x = 7 или x = 6
1) x^2 + 4x - 12 = 0
(x + 6)(x - 2) = 0
x + 6 = 0 => x = -6
x - 2 = 0 => x = 2
Ответ: x = -6 или x = 2
2) x^2 - 6x + 8 = 0
(x - 2)(x - 4) = 0
x - 2 = 0 => x = 2
x - 4 = 0 => x = 4
Ответ: x = 2 или x = 4
3) x^2 - 16x + 64 = 0
(x - 8)(x - 8) = 0
(x - 8)^2 = 0
x - 8 = 0 => x = 8
Ответ: x = 8
4) x^2 - 13x + 42 = 0
(x - 7)(x - 6) = 0
x - 7 = 0 => x = 7
x - 6 = 0 => x = 6
Ответ: x = 7 или x = 6