document.write( "Question 714050: hey can yousolve x^3+216=0 \n" ); document.write( "

Algebra.Com's Answer #438654 by Alan3354(69443) $\"\"$ $\"About$

You can put this solution on YOUR website!
x^3+216=0
\n" ); document.write( "-----------
\n" ); document.write( "x^3 = -216
\n" ); document.write( "x^3 = 216cis(180)
\n" ); document.write( "x = 6cis(60) = 6(cos(60) = i*sin(60))
\n" ); document.write( "x = 6cis(180) = -6
\n" ); document.write( "x = 6cis(300)
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\n" ); document.write( "I don't know if you want all 3
\n" ); document.write( "x = -6 is the most obvious, and the only real solution \n" ); document.write( "

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