Gangell715 Gangell715

20-06-2015
Mathematics

Answered

x^2 - 5x - 66 = 0 Factor and solve

Verified Answer :

20-06-2015

\(x^2-5x-66=0 \\ x^2+6x-11x-66=0 \\ x(x+6)-11(x+6)=0 \\ (x-11)(x+6)=0 \\ x-11=0 \ \lor \ x+6=0 \\ x=11 \ \lor \ x=-6 \\ \boxed{x=-6 \hbox{ or } x=11}\)

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