document.write( "Question 295398: factor the expression -28y2power +7t2power \n" ); document.write( "
Algebra.Com's Answer #212925 by checkley77(12844)\"\" \"About 
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-28y^2+7t^2
\n" ); document.write( "-7(4y^2-t^2)
\n" ); document.write( "-7(2y+t)(2y-t) ans.
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