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    which of the following is a quadratic expression?

    A.  x+10


    B.  2x-y


    C. x2+10x+21


    D. x-5=7

    0  Views: 446 Answers: 1 Posted: 11 years ago

    1 Answer

    Samples are here, to make your choice easier for you.


    http://www.teacherschoice.com.au/sample_help_1_alg.htm



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