document.write( "Question 172427: tutors i need help with alg 2 i have a 72 in the class because i couple bad test scores and my teacher gave us the questions from the test so can you please help me
\n" ); document.write( "i need to know how to find the intercept , find the vertex and graph it in t chart form every time i do the chart it doesnt look right
\n" ); document.write( "the problem is y=2(x+4)(x+2) \n" ); document.write( "

Algebra.Com's Answer #127327 by Earlsdon(6294) $\"\"$ $\"About$

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$\"y+=+2%28x%2B4%29%28x%2B2%29\"$ To find the x-intercepts, set y equal to zero.
\n" ); document.write( " $\"2%28x%2B4%29%28x%2B2%29+=+0\"$ so...
\n" ); document.write( " $\"%28x%2B4%29%28x%2B2%29+=+0\"$ , therefore, the x-intercepts are...
\n" ); document.write( " $\"x+=+-4\"$ and $\"x+=+-2\"$
\n" ); document.write( "The x-coordinate of the vertex is found by:
\n" ); document.write( " $\"x+=+-b%2F2a\"$ Expand the given equation by multiplying the factors:
\n" ); document.write( " $\"y+=+2%28x%5E2%2B6x%2B8%29\"$
\n" ); document.write( " $\"y+=+2x%5E2%2B12x%2B16\"$ so a = 2 and b = 12, then,
\n" ); document.write( " $\"x+=+-b%2F2a\"$ = $\"-12%2F2%282%29+=+-3\"$ Substitute into the original equation to find the y-coordinate.
\n" ); document.write( " $\"y+=+2%28-3%2B4%29%28-3%2B2%29\"$
\n" ); document.write( " $\"y+=+2%281%29%28-1%29\"$
\n" ); document.write( " $\"y+=+-2\"$
\n" ); document.write( "The vertex is at (-3, -2)
\n" ); document.write( " $\"graph%28400%2C400%2C-5%2C5%2C-5%2C5%2C2x%5E2%2B12x%2B16%29\"$ \n" ); document.write( "

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