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March 30, 2017

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Solve by completing the square x2 - 2x - 5 = 0. Help please

a)1 plus or minus√6
b)-1 plus or minus√6
c)-3 plus or minus 2√6
d)3 plus or minus 2√6

  • Algebra help - ,

    x^2-2x + ...=5
    half of -2,then square it.
    x^2-2x+1=5+1
    (x-1)^2=(sqrt6)^2
    you finish.

  • Algebra help - ,

    i don't know how?(:<

  • Algebra help - ,

    (x-1)^2=sqrt6^2
    Take the square root of both sides.
    x-1=sqrt6..
    you have to know how to finish from here

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