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√x = 1 + x
√x ² = ( 1 + x ) ²
x = 1 + 2x + x²
0 = 1 + x + x²
Aquí las respuestas son imaginarias
2) (x-2)² = x
x² - 4x + 4 = x
x ² - 5x + 4= 0
(x - 4)(x - 1) = 0
x = 4 ; x = 1
3) √x - 8 = 2
√x = 10
x = 10²
x = 100