document.write( "Question 978457: Should i write a4-7a²b²+kb4 in f(a) or f(b)?
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\n" ); document.write( "because i am confused and it has 2 variables in this polynomial.
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Algebra.Com's Answer #599868 by Alan3354(69443)\"\" \"About 
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Should i write a4-7a²b²+kb4 in f(a) or f(b)?
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\n" ); document.write( "If they're both variables, it's
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