document.write( "Question 322193: how can i solve this
\n" ); document.write( "(r-2)^2-(r+2)^2 \n" ); document.write( "

Algebra.Com's Answer #230669 by Alan3354(69443) $\"\"$ $\"About$

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how can i solve this
\n" ); document.write( "(r-2)^2-(r+2)^2
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\n" ); document.write( "You can't solve it, it's not an equation.
\n" ); document.write( "It might be simplified some.
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\n" ); document.write( "(r-2)^2-(r+2)^2
\n" ); document.write( "One way is to expand everything:
\n" ); document.write( " $\"%28r%5E2+-+4r+%2B+4%29+-+%28r%5E2+%2B+4r+%2B+4%29\"$
\n" ); document.write( "= -8r
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\n" ); document.write( "Another way is to factor it as a difference of 2 squares:
\n" ); document.write( "= [(r-2) + (r+2)]
\n" ); document.write( "= 2r * -4
\n" ); document.write( "= -8r
\n" ); document.write( " \n" ); document.write( "

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