LaDeebo
LaDeebo LaDeebo
  • 28-04-2017
  • Mathematics
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How do you solve the equation u^2-8=7u by factoring?

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j4cek
j4cek j4cek
  • 28-04-2017
[tex]u^2-8=7u[/tex]
[tex]u^2-7u-8=0[/tex]
[tex]u^2-8u+u-8=0[/tex]
[tex]u(u-8)+(u-8)=0[/tex]
[tex](u-8)(u+1)=0[/tex]
[tex]\boxed{u=8\lor u=-1}[/tex]
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