document.write( "Question 109955: I need help!! How would you solve $\"x%5E2%2B80=0\"$ using a+bi? \n" ); document.write( "

Algebra.Com's Answer #80260 by ankor@dixie-net.com(22740) $\"\"$ $\"About$

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How would you solve $\"x%5E2%2B80=0\"$ using a+bi?
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\n" ); document.write( "How about this:
\n" ); document.write( " $\"x%5E2+=+-80\"$
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\n" ); document.write( " $\"x+=+sqrt%28-80%29\"$
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\n" ); document.write( "Think of it like this, remember i^2 = -1
\n" ); document.write( " $\"x+=+sqrt%2816%2A5%2Ai%5E2%29\"$
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\n" ); document.write( "Extract the square roots:
\n" ); document.write( " $\"x+=+4i%2Asqrt%285%29\"$
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\n" ); document.write( "In the a + bi form
\n" ); document.write( " $\"x+=+0+%2B+4sqrt%285%29i\"$ \n" ); document.write( "

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