document.write( "Question 83339: for the quadratic function:
\n" ); document.write( "f(x)=3(x+4)^2\r
\n" ); document.write( "\n" ); document.write( "state the vertex:( , )
\n" ); document.write( "does the parabola open up or down.
\n" ); document.write( "the function has ___ real zeros \n" ); document.write( "

Algebra.Com's Answer #59833 by jim_thompson5910(35256) $\"\"$ $\"About$

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Using the vertex form \r
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\n" ); document.write( "\n" ); document.write( " $\"y=a%28x-h%29%5E2%2Bk\"$ where a states the shape and direction, and (h,k) is the vertex, \r
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\n" ); document.write( "\n" ); document.write( "The equation $\"f%28x%29=3%28x%2B4%29%5E2\"$ which also looks like $\"f%28x%29=3%28x-%28-4%29%29%5E2%2B0\"$ , has a vertex at (-4,0). Also, since a>0, the graph opens up. So here's the graph to visually sum it up\r
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graph of $\"y=3%28x%2B4%29%5E2\"$ with the vertex (blue dot) \n" ); document.write( "

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