document.write( "Question 709932: How do you factor x^4-21x^2-100? \n" ); document.write( "

Algebra.Com's Answer #436848 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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factor x^4 - 21x^2 - 100
\n" ); document.write( "(x^2 - 25)(x^2 + 4)
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\n" ); document.write( "(x^2 - 25) is the difference of squares can be factored
\n" ); document.write( "(x - 5)(x + 5)
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\n" ); document.write( "We have (x^2 + 4)(x - 5)(x + 5) \n" ); document.write( "

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