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carol94 carol94
  • 03-11-2014
  • Mathematics
Answered

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

Verified Answer :

konrad509
konrad509 konrad509
  • 03-11-2014

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

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