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(x-1)(x-5) = -3 , efectuando
x² - 6x + 5 +3 = 0
x² - 6x + 8 = 0
x..........-4
x..........-2
(x-4)(x-2) = 0
x = 4
x = 2
por lo tanto existen 2 valores que satisfacen la ecuación planteada
RESOLVIENDO:
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(x - 1) (x - 5) = -3
x² - 5x -x + 5 = -3
x² - 6x + 5 + 3 = 0
x² - 6x + 8 = 0
x -2 => (x - 2)
x - 4 => (x - 4)
Entonces:
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x - 2 = 0
x = 2 => Solución 1
x - 4 = 0
x = 4 => Solución 2
COMPROBAMOS:
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Si : x = 2
(x - 1) (x - 5) = -3
(2 - 1) (2 - 5) = -3
(1) (-3) = -3
-3 = -3 => CORRECTO
Si : x = 4
(x - 1) (x - 5) = -3
(4 - 1) (4 - 5) = -3
(3) (-1) = -3
-3 = -3 => CORRECTO
RESPUESTA:
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X = [ 2 ; 4 ]