Resolver esta ecuación de 2do grado
B) 2x ^ 2 - 1 = x ^ 2 + 8
B) 2x ^ 2 - 1 = x ^ 2 + 8
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Explicación paso a paso:
2x²-1 = x²+8
x²-9= 0
(x+3)*(x-3) = 0
x+3=0
x = -3
x-3=0
x=3
valores de x: -3 y 3