document.write( "Question 486443: What is find the value of x^4 - 2x^2 + 1 for x = -4. \n" ); document.write( "

Algebra.Com's Answer #332536 by Tatiana_Stebko(1539) $\"\"$ $\"About$

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$\"x%5E4+-+2x%5E2+%2B+1\"$
\n" ); document.write( "Use formula $\"a%5E2-2ab%2Bb%5E2=%28a-b%29%5E2\"$
\n" ); document.write( " $\"x%5E4+-+2x%5E2+%2B+1=%28x%5E2%29%5E2-2%2Ax%5E2%2A1%2B1%5E2=%28x%5E2-1%29%5E2\"$
\n" ); document.write( "for $\"x=-4\"$
\n" ); document.write( " $\"%28%28-4%29%5E2-1%29%5E2=%2816-1%29%5E2=15%5E2=225\"$ \n" ); document.write( "

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