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प्रश्न
Which of the following are quadratic equation:
`(x -(1)/x)^2` = 0.
उत्तर
Given equation is
`(x -(1)/x)^2` = 0
⇒ `x^2 + (1)/(x^2) - 2x (1)/x` = 0
⇒ x4 + 1 - 2x2 = 0
⇒ x4 - 2x2 + 1 = 0
It is not a quadratic equation.
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