Pre-Calc help:
Write the general equation for the circle that passes through the points (1, 1), (1, 3), and (9, 2).
You must include the appropriate sign (+ or -) in your answer. Do not use spaces in your answer.
8x² + 8y²___x___y = 0

Step-by-step explanation:

Let the equation be :

The point (1,1) must satisfy this equation.

Similarly, the point (1,3) must satisfy:

Also for the point (9,2), we have:

Solving the equations (1), (2) and (3) simultaneously, we get:

We Substitute this values to get:

Multiply through by 8 to get:

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step-by-step explanation: