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(x - 1)( x + 1) = 360
x^2 + x - x - 1 = 360
x^2 = 361
Así que
x1 = √361
x2 = -√361
(x - 1)(x + 1) = 360 Aplicas productos notables
(a + b)(a - b) = a² - b²
x² - 1 = 360
x² = 360 + 1
x² = 361
x = √361 Tiene 2 soluciones
x = 19 Porque 19 * 19 = 361
o
x = - √361
x = - 19 Porque (- 19)( - 19) = 361
Solucion
(19 , - 19)