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  • Help me please, - Complex numbers and quadratic equations - JEE Main-7

Value of 'a' for which \left ( a^{2}-1 \right )x^{2}+\left ( 2a+3 \right )x+5= 0  represents a quadratic equation with real coefficients is

  • Option 1)

    \pm 1

  • Option 2)

    R-\left \{ +1,-1 \right \}

  • Option 3)

    R

  • Option 4)

    R^{+}

 

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