document.write( "Question 35827: x^4-16=0 \n" ); document.write( "

Algebra.Com's Answer #21927 by rapaljer(4671) $\"\"$ $\"About$

You can put this solution on YOUR website!
This equation factors as the difference of two squares:
\n" ); document.write( " $\"x%5E4+-+16=0+\"$
\n" ); document.write( " $\"%28x%5E2+-+4%29%28x%5E2+%2B+4%29+=0\"$ \r
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\n" ); document.write( "\n" ); document.write( "The first factor factors again:
\n" ); document.write( " $\"%28x-2%29%28x%2B2%29%28x%5E2+%2B+4%29+=+0\"$ \r
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\n" ); document.write( "\n" ); document.write( "Now, set each factor equal to zero and solve:
\n" ); document.write( " $\"x=2\"$ or $\"x=+-2\"$ or $\"x%5E2=-4\"$ \r
\n" ); document.write( "\n" ); document.write( " $\"x=2\"$ or $\"x=+-2\"$ or $\"x+=+sqrt%28-4%29\"$ or $\"+x+=+-+sqrt%28-4%29+\"$
\n" ); document.write( " $\"x=2\"$ or $\"x=+-2\"$ or $\"x=+2i\"$ or $\"x=+-2i+\"$ \r
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\n" ); document.write( "\n" ); document.write( "R^2 at SCC \n" ); document.write( "

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