document.write( "Question 389607: estimate the
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Algebra.Com's Answer #276133 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi,         
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document.write( "Note: roots of an equation are found when y = 0
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document.write( "     x^2 - 4 = 0
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document.write( "       x^2 = 4
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document.write( "        x = ± 2 \r
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