System of Equations with Unknown Variables

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SUMMARY

The discussion focuses on solving a system of equations involving three variables: x, y, and z. The equations provided are x² + y² = 1, x² + z² + xz√3 = 4, and y² + z² + zy = 3. The user successfully isolates y² in the first equation and attempts to manipulate the third equation to isolate z, suggesting treating it as a quadratic equation. The key takeaway is the importance of recognizing the quadratic form to solve for z effectively.

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Je m'appelle
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Homework Statement



Hello there, I'm having trouble solving the following system:

x^2 + y^2 = 1 (I)

x^2 + z^2 + x*z*sqrt(3) = 4 (II)

y^2 + z^2 + z*y = 3 (III)


Homework Equations





The Attempt at a Solution



Working on (I):

y^2 = 1 - x^2

Working on (III):

(1 - x^2) + z^2 + z*sqrt(1 - x^2) = 3

z = (2 + x^2)/(z + sqrt(1 - x^2))

And here starts the problem, because I can't isolate the 'z', so I can't really move on.
 
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It may look ugly in the end, but to isolate z after you've started working on eqn 3, treat it as a quadratic equation in z.
 
Gib Z said:
It may look ugly in the end, but to isolate z after you've started working on eqn 3, treat it as a quadratic equation in z.

Thank you, I'll try it.
 

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