document.write( "Question 280528: (12x^4 - 9xz + 6xz^2) - (3x^4 + 9xz + 4xz^2) \n" ); document.write( "
Algebra.Com's Answer #203900 by richwmiller(17219)\"\" \"About 
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9x^4-18xz+2xz^2 \n" ); document.write( "
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