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Resolver.
6x² - 5(x + 1) = x(x + 1) + 4
Aplicamos la propiedad distributiva.
a(b + c) = ab + ac
6x² - 5x + 5 = x² + x + 4
6x² - x² - 5x - x = 4 - 5
5x² - 6x = - 1
5x² - 1 - 6x = 0
5x +6
x - 1
(5x -1) (x + 6)
Tenemos dos soluciones.
5x - 1 = 0
5x = 1
x = 1/5
.......................................................
x + 6 = 0
x = - 6
Solución.
( - 1/5, - 6)