document.write( "Question 328919: simplify the radical expression. note \"a\" doesnt have to be a positive number\r
\n" ); document.write( "\n" ); document.write( "4√a^4
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Algebra.Com's Answer #235664 by xoapplexx(2)\"\" \"About 
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4 sqrt a^4 is simplified to 4a^2.
\n" ); document.write( "This is because:
\n" ); document.write( "sqrt a^4 is equal to 'a' times 'a' times 'a' times 'a'.
\n" ); document.write( "when you sqrt, you know that a^2 times a^2 is equal to a^4 because 2+2=4.
\n" ); document.write( "therefore, the expression can be simplified to 4a^2
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