document.write( "Question 1149607: find the equation of the normal to the curve y=3+2x-x^2 which is parallel to the line 2y-x=3 \n" ); document.write( "
Algebra.Com's Answer #770939 by greenestamps(13200)\"\" \"About 
You can put this solution on YOUR website!


\n" ); document.write( "The derivative of the function for the given curve is the slope of the curve at any point.

\n" ); document.write( "\"y+=+3%2B2x-2x%5E2\"
\n" ); document.write( "\"dy%2Fdx+=+2-2x\"

\n" ); document.write( "The slope of the given line is 1/2; we want the slope of the normal to the curve to also be 1/2. That means we want the slope of the curve at that point to be -2.

\n" ); document.write( "\"2-2x+=+-2\"
\n" ); document.write( "\"4+=+2x\"
\n" ); document.write( "\"x+=+2\"

\n" ); document.write( "\"y+=+f%28x%29+=+3%2B2%282%29-2%5E2+=+3\"

\n" ); document.write( "The slope is 1/2; the point on the curve is (2,3). The equation of the normal is

\n" ); document.write( "\"y+=+%281%2F2%29x%2B2\"

\n" ); document.write( "A graph, showing the given curve (red), the given line (green), and the normal to the curve parallel to the given line (blue).

\n" ); document.write( "\"graph%28400%2C400%2C-2%2C4%2C-1%2C5%2C3%2B2x-x%5E2%2C.5x%2B1.5%2C.5x%2B2%29\"

\n" ); document.write( "
\n" ); document.write( "
\n" );