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math

posted by on .

f(x)=4-x^2 simplify completly. Use difference quotient.

  • math - ,

    ( x - 2 ) ( x + 2 ) =

    x ^ 2 - 2 x + 2 x - 4 =

    x ^ 2 - 4 =

    - ( x ^ 2 - 4 ) =

    4 - x ^ 2


    So :

    4 - x ^ 2 = - ( x - 2 ) ( x + 2 )

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