document.write( "Question 90606: Find all real and imaginary solutions.\r
\n" ); document.write( "\n" ); document.write( "b^4+13b^2+36=0 \n" ); document.write( "

Algebra.Com's Answer #65775 by scott8148(6628) $\"\"$ $\"About$

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factoring gives (b^2+4)(b^2+9)=0\r
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\n" ); document.write( "\n" ); document.write( "for b^2+4=0, $\"b=sqrt%28-4%29\"$ and $\"b=-sqrt%28-4%29\"$ , so b=4i and -4i\r
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\n" ); document.write( "\n" ); document.write( "for b^2+9=0, $\"b=sqrt%28-9%29\"$ and $\"b=-sqrt%28-9%29\"$ , so b=9i and -9i \n" ); document.write( "

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