document.write( "Question 530358: factor the following expression: 9x^4-4y^2 \n" ); document.write( "
Algebra.Com's Answer #350016 by jim_thompson5910(35256)\"\" \"About 
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9x^4-4y^2\r
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\n" ); document.write( "\n" ); document.write( "(3x^2)^2-(2y)^2\r
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\n" ); document.write( "\n" ); document.write( "(3x^2-2y)(3x^2+2y)\r
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\n" ); document.write( "\n" ); document.write( "So 9x^4-4y^2 completely factors to (3x^2-2y)(3x^2+2y)
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