Gangell715
Gangell715
20-06-2015
Mathematics
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x^2 - 5x - 66 = 0 Factor and solve
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20-06-2015
[tex]x^2-5x-66=0 \\ x^2+6x-11x-66=0 \\ x(x+6)-11(x+6)=0 \\ (x-11)(x+6)=0 \\ x-11=0 \ \lor \ x+6=0 \\ x=11 \ \lor \ x=-6 \\ \boxed{x=-6 \hbox{ or } x=11}[/tex]
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