document.write( "Question 337746: Write the standard form of the equations of the circle that is tangent to the line x=3 and has center at (-2, -7) \n" ); document.write( "

Algebra.Com's Answer #242140 by Fombitz(32388) $\"\"$ $\"About$

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The perpendicular distance from the center to the line $\"x=3\"$ is the radius.
\n" ); document.write( " $\"R=3-%28-2%29=5\"$
\n" ); document.write( "Use the general equation of a circle centered at (h,k) with radius R.
\n" ); document.write( " $\"%28x-h%29%5E2%2B%28y-k%29%5E2=R%5E2\"$
\n" ); document.write( " $\"x-%28-2%29%29%5E2%2B%28y-%28-7%29%29%5E2=5%5E2\"$
\n" ); document.write( " $\"highlight%28%28x%2B2%29%5E2%2B%28y%2B7%29%5E2=25%29\"$
\n" ); document.write( " $\"x%5E2%2B4x%2B4%2By%5E2%2B14y%2B49=25\"$
\n" ); document.write( " $\"x%5E2%2B4x%2By%5E2%2B14y%2B28=0\"$ \n" ); document.write( "

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