document.write( "Question 196708: i think this is a function... but im not sure... \r
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\n" ); document.write( "\n" ); document.write( "(x-4)(x-4)=10
\n" ); document.write( "how do you do this? \n" ); document.write( "

Algebra.Com's Answer #147432 by Earlsdon(6294) $\"\"$ $\"About$

You can put this solution on YOUR website!
$\"%28x-4%29%28x-4%29+=+10\"$ Perform the indicated multiplication.
\n" ); document.write( " $\"x%5E2-8x%2B16+=+10\"$ Now subtract 10 from both sides.
\n" ); document.write( " $\"x%5E2-8x%2B6+=+0\"$ Write this equation as a function.
\n" ); document.write( " $\"f%28x%29+=+x%5E2-8x%2B6\"$
\n" ); document.write( "Ask the question: \"For each value of x, do you get a unique value of f(x)?\"
\n" ); document.write( "The answer here is yes, so it is is a function.
\n" ); document.write( "Another way to determine if it is a function is called the \"vertical line test\".
\n" ); document.write( "Graph the function and draw a vertical line through the curve. If the verical line intersects the curve in only one place, then it is a function.
\n" ); document.write( " $\"graph%28400%2C400%2C-5%2C10%2C-12%2C5%2Cx%5E2-8x%2B6%29\"$
\n" ); document.write( "This is also true, so it is a function. \n" ); document.write( "

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