document.write( "Question 523459: r^3-4r^2-16r+64 \n" ); document.write( "

Algebra.Com's Answer #347316 by nerdybill(7384) $\"\"$ $\"About$

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r^3-4r^2-16r+64
\n" ); document.write( "group terms:
\n" ); document.write( "(r^3-4r^2) - (16r-64)
\n" ); document.write( "factor each group:
\n" ); document.write( "r^2(r-4) - 16(r-4)
\n" ); document.write( "(r-4)(r^2-16)
\n" ); document.write( "but, we can rewrite the second term as:
\n" ); document.write( "(r-4)(r^2-4^2) (difference of squares)
\n" ); document.write( "(r-4)(r-4)(r+4)
\n" ); document.write( "or
\n" ); document.write( "(r+4)(r-4)^2\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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