document.write( "Question 74839This question is from textbook Beginning Algebra
\n" ); document.write( ": Solve the following quadratic equations by factoring or by any other techniques of this chapter and explain why you chose that method over the other methods or each problem. \r
\n" ); document.write( "\n" ); document.write( "\"%28x-1%29%5E2=7\"\r
\n" ); document.write( "\n" ); document.write( "The answer I got was \"2sqrt%287%2B1%29\". I am not sure what method I used and why or how to explain it. I am needed some help with that part. Is this answer correct? Thanks
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Algebra.Com's Answer #53763 by jim_thompson5910(35256)\"\" \"About 
You can put this solution on YOUR website!
\"sqrt%28%28x-1%29%5E2%29=0%2B-sqrt%287%29\"Take the square root of both sides
\n" ); document.write( "\"x%2Bcross%28-1%2B1%29=0%2B-sqrt%287%29%2B1\"Add 1 to both sides
\n" ); document.write( "So x equals
\n" ); document.write( "\"x=0%2B-sqrt%287%29%2B1\"note: ignore the zero
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\n" ); document.write( "Check:
\n" ); document.write( "\"%28%28sqrt%287%29%2B1%29-1%29%5E2=7\"Plug in \"x=sqrt%287%29%2B1\"
\n" ); document.write( "\"%28sqrt%287%29%29%5E2=7\"
\n" ); document.write( "\"7=7\"works
\n" ); document.write( "\"%28%28-sqrt%287%29%2B1%29-1%29%5E2=7\"Plug in \"x=-sqrt%287%29%2B1\"
\n" ); document.write( "\"%28-sqrt%287%29%29%5E2=7\"
\n" ); document.write( "\"7=7\"works \n" ); document.write( "

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