Question:medium

If the circle $x^2 + y^2 + 2x - 2y + c = 0$ cuts the circle $x^2 + y^2 - 4x - 6y + 11 = 0$ orthogonally, then the value of $c$ is:

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Memorize the orthogonality condition: $2g_1g_2 + 2f_1f_2 = c_1 + c_2$. Be careful to keep the correct signs of $g$ and $f$.

Updated On: May 31, 2026

$-9$
$9$
$-13$
$13$

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The Correct Option is A

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