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Given line $x+2y=3$ intersects circle \[x^2+y^2+x-6y+a=0\] at $P$ and $Q$. If $O$ is the origin and $OP\perp OQ$, what is the value of $a$?

 Feb 9, 2021
 #1
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Strictly a graphical solution.....I found "a"  =  4.2

 

 

cool cool cool

 Feb 9, 2021

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