Algebra.Com's Answer #61688 by Earlsdon(6294)![\"\"](\"/images/stars/stars-13.gif\")  
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Solve:
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document.write( " First, separate the square roots. Subtract  from both sides.
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document.write( " Next, square both sides.
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document.write( " Simplify so that you have only the radical (or a multiple thereof) on one side.
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document.write( " Add x to both sides.
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document.write( " Subtract 18 from both sides.
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document.write( " Now square both sides again.
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document.write( " Simplify this so that you have a quadratic equation in standard form.
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document.write( " Add 64x to both sides.
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document.write( " Subtract 128 from both sides.
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document.write( " Factor out a 4 to simplify this.
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document.write( " Now factor the parentheses.
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document.write( " Applying the zero products principle, you get the double root:
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document.write( "Check:
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document.write( " Set x = -2.
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document.write( " Simplify.
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