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March 28, 2017

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If ax^2 + bx + c = 0 If a,b,c E R. Find the condition that this equation would have atleast one root in [0,2].

  • maths - ,

    a x ^ 2 + b x + c = a ( x - x1 ) ( x - x2 )

    In this case :

    a x ^ 2 + b x + c = a ( x - 0 ) ( x - 2 ) = a x ( x - 2 ) = a ( x ^ 2 - 2 x )

  • maths - ,

    plse explain me again, i didn't get it..

  • maths - ,

    plsee ..i need urgent

  • maths - ,

    If x1 and x2 are two roots of equation

    a x ^2 + b x + c =0

    then

    a x ^ 2 + b x + c = a ( x - x1 ) ( x -x2 )

  • maths - ,

    a

    is leading coefficient

  • maths - ,

    That is true for any value of a

    example:

    3 ( x ^ 2 - 2 x ) = 0

    has roots 0 and 2


    7 ( x ^ 2 - 2 x ) = 0

    has roots 0 and 2


    39 ( x ^ 2 - 2 x ) = 0

    has roots 0 and 2

    etc.

  • maths - ,

    Thank You so much..

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