anonymous
  • anonymous
What is the solution to ? A. x = 5 or x = –7 B. x = –5 or x = 7 C. x = 5 or x = 7 D. no solutio
Mathematics
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
equation is X^2-35=2x
johnweldon1993
  • johnweldon1993
We can subtract 2x from both sides to make the equation = 0 , then use the quadratic formula x² - 2x - 35 = 0 can you do this?
anonymous
  • anonymous
\[x^2 -35 = 2x\] \[x^2-2x-35=0\] Find the roots You will end up with... \[(x-7)(x+5)=0\] So when is this equation true?

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anonymous
  • anonymous
okay @johnweldon1993 @DoYourHomework thank you
johnweldon1993
  • johnweldon1993
no problem!
anonymous
  • anonymous
so x = 5 or x = 7?
johnweldon1993
  • johnweldon1993
not quite....remember those numbers have to multiply together to = -35 7 Times 5 doesn't equation -35 ...it does = 35 One of those numbers has to be a negative...Look again what @DoYourHomework wrote above :)
anonymous
  • anonymous
x = 5 or x = –7 or x = –5 or x = 7

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