document.write( "Question 204613: what is the solution of x^2-4x+4=0
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Algebra.Com's Answer #154423 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
Solve for x:
\n" ); document.write( " $\"x%5E2-4x%2B4+=+0\"$ Factor the trinomial.
\n" ); document.write( " $\"%28x-2%29%28x-2%29+=+0\"$ Apply the zero product rule.
\n" ); document.write( " $\"x-2+=+0\"$ or $\"x-2+=+0\"$ so the roots are:
\n" ); document.write( " $\"x+=+2\"$ and $\"x+=+2\"$
\n" ); document.write( "This is called a double root and it arises because the vertex of the parabola just touches the x-axis.
\n" ); document.write( " $\"graph%28400%2C400%2C-5%2C5%2C-5%2C5%2Cx%5E2-4x%2B4%29\"$ \n" ); document.write( "

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