document.write( "Question 297166: What the fuck is the vertex of x^2-3x-21 \n" ); document.write( "

Algebra.Com's Answer #213992 by nyc_function(2741) $\"\"$ $\"About$

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\n" ); document.write( "\n" ); document.write( "We first need to find the value of x using x = -b/2a.\r
\n" ); document.write( "\n" ); document.write( "In your trinomial, a = 1, b = -3 and c = -21. See it?\r
\n" ); document.write( "\n" ); document.write( "We now use a = 1 and b = -3 to find your x value.\r
\n" ); document.write( "\n" ); document.write( "x = -(-3)/2(1)\r
\n" ); document.write( "\n" ); document.write( "x = 3/2\r
\n" ); document.write( "\n" ); document.write( "Now, x = 3/2 is the value of the x-coordinate of your vertex point in the form (x,y).\r
\n" ); document.write( "\n" ); document.write( "Understand?\r
\n" ); document.write( "\n" ); document.write( "I found x but how do I find y?\r
\n" ); document.write( "\n" ); document.write( "Simply replace every x that you see in your trinomial with 3/2 and simplify.\r
\n" ); document.write( "\n" ); document.write( "I will set it up and you do the math.\r
\n" ); document.write( "\n" ); document.write( "y = (3/2)^2 - 3(3/2) - 21\r
\n" ); document.write( "\n" ); document.write( "When you solve for y, you will then have your vertex point in the form (x,y).\r
\n" ); document.write( "\n" ); document.write( "Understand?\r
\n" ); document.write( "\n" ); document.write( " \n" ); document.write( "

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