document.write( "Question 81000: can i please have help to solve this?
\n" ); document.write( "(x-1)^2=5
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Algebra.Com's Answer #58101 by bucky(2189)\"\" \"About 
You can put this solution on YOUR website!
Given:
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\n" ); document.write( "\"%28x-1%29%5E2=5\"
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\n" ); document.write( "Square the left side and the equation becomes:
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\n" ); document.write( "\"x%5E2+-+2x+%2B1+=+5\"
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\n" ); document.write( "Then get this equation into standard quadratic form by eliminating the 5 on the right side
\n" ); document.write( "so that the right side becomes 0. Do this by subtracting 5 from both sides. When you do
\n" ); document.write( "that subtraction the equation becomes:
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\n" ); document.write( "\"x%5E2+-+2x+-+4+=+0\"
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\n" ); document.write( "The left side of this equation does not factor nicely. So use the quadratic formula. This
\n" ); document.write( "formula says that for a quadratic equation of the standard form:
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\n" ); document.write( "\"ax%5E2+%2B+bx+%2B+c+=+0\"
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\n" ); document.write( "The values of x that satisfy this equation are given by the equation:
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\n" ); document.write( "\"x+=+%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29\"
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\n" ); document.write( "By comparing our equation with the standard form you can see that a = 1, b = -2, and c = -4.
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\n" ); document.write( "By substituting these values into the equation that defines the values of x you get:
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\n" ); document.write( "\"x+=+%28-%28-2%29%2B-sqrt%28%28-2%29%5E2+-4%281%29%28-4%29%29%29%2F%282%2A1%29\"
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\n" ); document.write( "This simplifies to:
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\n" ); document.write( "\"x+=+%282%2B-sqrt%284+%2B+16%29%29%2F2+=+%282%2B-sqrt%2820%29%29%2F2+\"
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\n" ); document.write( "Note that \"sqrt%2820%29+=+sqrt%284%2A5%29+=+sqrt%284%29%2Asqrt%285%29+=+2%2Asqrt%285%29\"
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\n" ); document.write( "Substituting \"2%2Asqrt%285%29\" for \"sqrt%2820%29\" reduces the equation for x to:
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\n" ); document.write( "\"x+=+%282+%2B-+2%2Asqrt%285%29%29%2F2+=+1%2B-sqrt%285%29\"
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\n" ); document.write( "So this problem has two solutions for x ... \"x+=+1+%2B+sqrt%285%29\" and \"x+=+1+-+sqrt%285%29\"
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\n" ); document.write( "Hope this helps you to understand the problem a little better.
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