document.write( "Question 619066: what is the vertex of x^2-4?!
\n" ); document.write( "I think I did it wrong because once I plugged in my input values(-2,-1,0,1,2) I got (-2,-16) (-1,-4) (0,0) (1,-4) (2,-16) so once I graphed it I got a downward parabola, and isnt it supposed to be upward since my x^2 is positive?! Please help me figure this out! Also, once for the the vertex points I did (x+2)=0 and (x-2)=0 to solve for x then I simply plugged it in to find y; however, once I did that my vertex points turned out to be (-2,16) (2,16)! This shouldnt be right since the vertex is the highest and lowest value! Please help... Thank you! \n" ); document.write( "

Algebra.Com's Answer #389305 by jim_thompson5910(35256) $\"\"$ $\"About$

You can put this solution on YOUR website!
I'm not sure how you're getting those output values. When x = -2, y is...\r
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\n" ); document.write( "\n" ); document.write( "y = x^2 - 4\r
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\n" ); document.write( "\n" ); document.write( "y = (-2)^2 - 4\r
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\n" ); document.write( "\n" ); document.write( "y = 4 - 4\r
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\n" ); document.write( "\n" ); document.write( "y = 0\r
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\n" ); document.write( "\n" ); document.write( "So when x = -2, y = 0. So we have the point (-2,0)\r
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\n" ); document.write( "\n" ); document.write( "Hopefully that will get you on the right track. If not, please let me know. \n" ); document.write( "

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