How can I solve a system equation with known solution?

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The discussion focuses on solving a system of equations defined by x*y = 3 and 4x² + 2y² = 72. The known solution is x = y = √3. Participants emphasize the substitution method, where y is expressed as 3/x, and then substituted into the second equation to find valid solutions. The conclusion is that x = 0 is not a solution, confirming that the only valid solution is x = y = √3.

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Hi,
I have a system equation that I know its solution, but I want the steps that I can solve it:

x*y = 3
4x2 + 2y2 = 72

x=y = √3

Thank you.
 
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naoufelabs said:
Hi,
I have a system equation that I know its solution, but I want the steps that I can solve it:

x*y = 3
4x2 + 2y2 = 72

x=y = √3

Thank you.

First observe that x=0 is not a solution. Then we know that y=\frac{3}{x}. Substitute this in the equation
4^{x^2}+2^{y^2}=72
 
Thanks
 

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