document.write( "Question 269735: How do I find a real or imaginary solution to w^2 = -225? \n" ); document.write( "
Algebra.Com's Answer #197647 by ankor@dixie-net.com(22740)\"\" \"About 
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How do I find a real or imaginary solution to w^2 = -225?
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\n" ); document.write( "Use i, the square root of -1
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\n" ); document.write( "w^2 = -225?
\n" ); document.write( "w = +/-\"sqrt%28225%2A-1%29\"
\n" ); document.write( "w = +15i
\n" ); document.write( "and
\n" ); document.write( "w = -15i
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\n" ); document.write( "You can prove this to yourself on a good a calc:
\n" ); document.write( "enter (-15i)^2 = -225
\n" ); document.write( "enter (15i)^2 = -225
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