Claire94
Claire94
18-02-2015
Mathematics
contestada
How do you find x
X*-6x-7=0
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konrad509
konrad509
18-02-2015
[tex]x^2-6x-7=0\\ x^2+x-7x-7=0\\ x(x+1)-7(x+1)=0\\ (x-7)(x+1)=0\\ x=7 \vee x=-1[/tex]
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