anonymous
  • anonymous
Solve: 8x - y = -6 and xy = 9
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
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2bornot2b
  • 2bornot2b
\[x=9/y\] Putting the above value of x in the first equation \[72/y-y=-6\implies 72-y^2=-6y\implies y^2-6y-72=0\]
2bornot2b
  • 2bornot2b
I hope you can solve the quadratic equation....
anonymous
  • anonymous
So I just do the quad form and then it should give me my answer for Y?

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anonymous
  • anonymous
Awesome, thanks
2bornot2b
  • 2bornot2b
Yes, you will get two values of y, by solving the above quadratic equation. Now put each of them on any one of your equations, and you will get two values of x. So that's the solution, two values of x and two values of y.
2bornot2b
  • 2bornot2b
You are welcome! It also must be mentioned here, that the solutions must be written in such a way such that the reader can make out from your writing which x is corresponding to which y.

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