document.write( "Question 594223: Solve by using quadratic formula:
\n" ); document.write( "(r-4)(r+12)=16 \n" ); document.write( "

Algebra.Com's Answer #376671 by rfer(16322) $\"\"$ $\"About$

You can put this solution on YOUR website!
r^2+12r-4r-48=16
\n" ); document.write( "y=-r^2-8r+64
\n" ); document.write( "(5,0)
\n" ); document.write( "(-13,0)
\n" ); document.write( "y int (0,64)
\n" ); document.write( "opens down \n" ); document.write( "

\n" );