document.write( "Question 679223: x^2=16x= -3\r
\n" ); document.write( "\n" ); document.write( "what value should be added to both sides of equation?\r
\n" ); document.write( "\n" ); document.write( "3? i think...
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Algebra.Com's Answer #421872 by ReadingBoosters(3246)\"\" \"About 
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Starting with
\n" ); document.write( "\"x%5E2%2B16x+=+-3\"
\n" ); document.write( "Yes, add 3 to both sides.
\n" ); document.write( "\"x%5E2%2B16x%2B3=0\"
\n" ); document.write( "...
\n" ); document.write( "If you are completing the square, then
\n" ); document.write( "take half of b and square it.
\n" ); document.write( "In this case, b is 16, half of 16 is 8 and 8 squared is 64.
\n" ); document.write( "Add 64 to both sides.
\n" ); document.write( "...
\n" ); document.write( "\"x%5E2+%2B+16x+%2B+64+=+-3+%2B+64\"
\n" ); document.write( "...
\n" ); document.write( "\"%28x%2B8%29%5E2+=+61\"
\n" ); document.write( "...
\n" ); document.write( "\"sqrt%28x%2B8%29%5E2\" = +/- \"sqrt%2861%29\"
\n" ); document.write( "...
\n" ); document.write( "x + 8 = +/- \"sqrt%2861%29\"
\n" ); document.write( "x = \"-8%2B-sqrt%2861%29\"\r
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