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-x +5 +5x
x -2 +2x
= + 7x
---> -x = -5
x = 5
---> x = 2
(-1)(-x2+7x-10)=(-1)0
x2 - 7x + 10 = 0
Aquí aplique aspa simple
(x - 5) (x - 2) = 0
Iguale a cero cada producto
x - 5 = 0 ^ x - 2 = 0
x = 5 ^ x = 2
c.s {5,2}
espero haberte ayudado ...