The equation whose roots are $\frac{1}{3 + \sqrt{2}}$ and $\frac{1}{3 - \sqrt{2}}$ is

  • A
    $7x^2 - 6x + 1 = 0$
  • B
    $6x^2 - 7x + 1 = 0$
  • C
    $x^2 - 6x + 7 = 0$
  • D
    $x^2 - 7x + 6 = 0$

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$Quantity \, 1$: Value of $y$. $A$ vessel contains $2.5 \, \text{liters}$ of water and $10 \, \text{liters}$ of milk. $20 \%$ of the contents of the vessel are removed. To the remaining contents,$x$ liters of water are added to reverse the ratio of water and milk. Then $y$ liters of milk are added again to reverse the ratio of water and milk. $Quantity \, 2$: $120 \, \text{liters}$.

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If ${b_1}{b_2} = 2({c_1} + {c_2})$,then at least one of the equations ${x^2} + {b_1}x + {c_1} = 0$ and ${x^2} + {b_2}x + {c_2} = 0$ has

The roots of the equation $a(x^2 + 1) - (a^2 + 1)x = 0$ are

Sum of roots is $-1$ and sum of their reciprocals is $\frac{1}{6}$,then the equation is

Solve the given two equations and select the correct answer from the given options.
$I.$ $x^{2}+5x+6=0$
$II.$ $y^{2}+7y+12=0$

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