document.write( "Question 8488: Please help me. I have no idea what they want.\r
\n" ); document.write( "\n" ); document.write( "5. Put the following in turning point form (y = a(x-h)^2+k) and give the vertex and y-intercept.\r
\n" ); document.write( "\n" ); document.write( "a) \"+y+=+x%5E2+%2B+2x+%2B+3+\"\r
\n" ); document.write( "\n" ); document.write( "c) \"+y+=+3x%5E2+-+6x+%2B+4+\"
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Algebra.Com's Answer #4686 by Earlsdon(6294)\"\" \"About 
You can put this solution on YOUR website!
While I'm familiar with the form: \"y+=+a%28x-h%29%5E2+%2B+k\", I was not aware that this form was called the turning point form...you learn something new every day!\r
\n" ); document.write( "\n" ); document.write( "Anyway, putting your quadratic equations in this form you can quickly identify the location of the vertex of the parabola and other features.\r
\n" ); document.write( "\n" ); document.write( "So, step 1, get the quadratics into the \"turning point\" form, \"y+=+a%28x-h%29%5E2+%2B+k\"\r
\n" ); document.write( "\n" ); document.write( "a) \"y+=+x%5E2+%2B+2x+%2B+3\" You will need to \"complete the square\". This is a process by which you can write any general quadratic function \"y+=+ax%5E2+%2B+bx+%2B+c\" in the form \"y+=+a%28x-h%29%5E2+%2B+k\" where the vertex of its graph can be identified. Heres how:\r
\n" ); document.write( "\n" ); document.write( "Isolate the x-terms by subtracting 3 from both sides:\r
\n" ); document.write( "\n" ); document.write( " \"y-3+=+x%5E2+%2B+2x\"\r
\n" ); document.write( "\n" ); document.write( "Add the square of one half the x-coefficient. That's \"%28%281%2F2%29%282%29%29%5E2\" = 1\r
\n" ); document.write( "\n" ); document.write( "\"y-3%2B1+=+x%5E2+%2B+2x+%2B+1\" Factor the trinomial as the square of a binomial.\r
\n" ); document.write( "\n" ); document.write( "\"y-2+=+%28x+%2B+1%29%5E2\" now add 2 to both sides.\r
\n" ); document.write( "\n" ); document.write( "\"y+=+%28x+%2B+1%29%5E2+%2B+2\" Here's your quadratic in \"turning point\" form, \"y+=+a%28x-h%29%5E2+%2B+k\".\r
\n" ); document.write( "\n" ); document.write( "The coordinates of the vertex are at: (h, k)
\n" ); document.write( "In this case, h = -1 and k = 2, so the vertex is located at (-1, 2)\r
\n" ); document.write( "\n" ); document.write( "To find the y-intercept, just set x = 0 in the original equation and solve for y.\r
\n" ); document.write( "\n" ); document.write( "\"y+=+x%5E2+%2B+2x+%2B+3\"
\n" ); document.write( "\"y+=+0%5E2+%2B+2%280%29+%2B+3\"
\n" ); document.write( "\"y+=+3\"\r
\n" ); document.write( "\n" ); document.write( "The y-intercept is located at: (0, 3)\r
\n" ); document.write( "\n" ); document.write( "Try this on problem c)\r
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