document.write( "Question 672282: Show work, find the complex zeros of the polynomial function, and write f in factored form.
\n" ); document.write( "f(x)=x⁴+22x²+21
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Algebra.Com's Answer #417893 by ewatrrr(24785)\"\" \"About 
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\n" ); document.write( "Hi,
\n" ); document.write( "f(x) = x^4 + 22x^2 + 21
\n" ); document.write( "f(x) = (x^2 + 21)(x^2+1)
\n" ); document.write( " (x^2 + 21)(x^2+1)= 0 ,
\n" ); document.write( " (x^2 + 21)= 0, x = ± \"i%2Asqrt%2821%29\"
\n" ); document.write( "0r(x^2+1)= 0 x = ± i \n" ); document.write( "
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