carol94 carol94

03-11-2014
Mathematics

contestada

i need help with math 1010
completing the square
x^2-9x=10

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konrad509 konrad509

03-11-2014

[tex]x^2-9x=10|+20.25\\ x^2-9x+20.25=30.25\\ (x-4.5)^2=30.25\\ x-4.5=5.5 \vee x-4.5=-5.5\\ x=10 \vee x=-1[/tex]

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