document.write( "Question 960963: Which of the following is equivalent to the expression 16x^8-100y^6 ?
\n" ); document.write( "A. (8x^4+50y^3)(8x^4-50y^3)
\n" ); document.write( "B. (8x^4+50y^4)(8x^4-50y^2)
\n" ); document.write( "C. (4x^4+10y^3)(4x^4-10y^3)
\n" ); document.write( "D. (4x^4+10y^4)(4x^4-10y^2)\r
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Algebra.Com's Answer #587277 by Edwin McCravy(20055) $\"\"$ $\"About$

You can put this solution on YOUR website!

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document.write( "FOIL them all out and see:\r\n" );
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document.write( "A.  NO\r\n" );
document.write( "B.  NO\r\n" );
document.write( "C.  NO\r\n" );
document.write( "D.  YES\r\n" );
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document.write( "Even though D is the correct answer, it's not completely factored.\r\n" );
document.write( "If fact D, although mathematically correct, is not what you should \r\n" );
document.write( "do first when factoring.\r\n" );
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document.write( "Here's the correct way to do the problem:\r\n" );
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document.write( "Factor out greatest common factor of 4. That's what you should do first,\r\n" );
document.write( "always!\r\n" );
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document.write( "Write  as  and  as \r\n" );
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document.write( "Factor the difference of squares.\r\n" );
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document.write( "That's the correct complete factorization even though \r\n" );
document.write( "it is not listed.\r\n" );
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document.write( "Edwin

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