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प्रश्न
`3x^2-2x-1=0`
उत्तर
`3x^2-2x-1=0`
⇒`9x^2-6x-3=0` (Multiplying both sides by 3)
`9x^2-6x-3=0 `
`(3x)^2-2xx3x xx1+1^2=3+1^2` [Adding `1^2` on both sides]
`(3x-1)^2=3+1=4(2)^2`
`3x-1=+-2` (Taking square root on both sides)
`3x-1=2 or 3x-1=-2`
`3x=3 or 3x=-1`
`x=1 or x=-1/3`
Hence, 1 and `-1/3` are the roots of the given equation.
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