How would you solve:

The circle x^2 + y^2 = 225 passes through the point (9,-12). Let L be the line passing through the origin and the point P. Find the equation of the line perpendicular to the line L and passing through the point P.

Question

How would you solve:

The circle x^2 + y^2 = 225 passes through the point (9,-12). Let L be the line passing through the origin and the point P. Find the equation of the line perpendicular to the line L and passing through the point P.

kva1992 · Answer

im guessing you move the x to the other side to get the y by itself so it would be something like

y^2=-x^2 +225

thats where i get stuck because if i square that i would get an imaginary number

kva1992 · Answer

an suggestions on how i should approach this problem?

freckles · Answer

I would like to start with a drawing:

freckles · Answer

sqrt(225) is 15 right?

freckles · Answer

yep

kva1992 · Answer

yeah it is

freckles · Answer

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wait what is point P?