document.write( "Question 18492: Hello again!\r
\n" ); document.write( "\n" ); document.write( "I really need help with this problem. Could someone kindly help me?
\n" ); document.write( "The class is working with Quadratic functions and graphs – I'm supposed to find the vertex and intercepts , then sketch its graph. l really need help.\r
\n" ); document.write( "\n" ); document.write( "y= -x^2 + 2x + 3\r
\n" ); document.write( "\n" ); document.write( "This is a head-scratcher for me. Thanks for all of the help. It is appreciated.
\n" ); document.write( "

Algebra.Com's Answer #8881 by Alwayscheerful(414)\"\" \"About 
You can put this solution on YOUR website!
Hi
\n" ); document.write( "I reccomend finding the vertex first, then the intercepts, then finally graph it. You can find the vertex using vertex form:
\n" ); document.write( "\"y-k=a%28x-h%29%5E2\"
\n" ); document.write( "(h,k) is your vertex
\n" ); document.write( "If you don't like doing a lot of math, here is a short cut
\n" ); document.write( "\"h=-b%2F2a\"
\n" ); document.write( "Standard form for quadratic equations: \"ax%5E2%2Bbx%2Bc=0\"
\n" ); document.write( "That gives you your X value of the vertex.
\n" ); document.write( "\"h=-2%2F2%2A-1\"
\n" ); document.write( "\"h=1\"
\n" ); document.write( "To find the Y value, plug 1 into the X value in the original equation
\n" ); document.write( "\"%28-1%29%5E2%2B2%281%29%2B3\"
\n" ); document.write( "\"1%2B2%2B3=6\"
\n" ); document.write( "Your vertex is (1,6)
\n" ); document.write( "X and Y-INTERCEPTS
\n" ); document.write( "The Y-intercept is always the number without a variable. So, in this question it is 3
\n" ); document.write( "There will be 2 X-intercepts.
\n" ); document.write( "I will factor this equation to find them.
\n" ); document.write( "\"%28x%2B1%29%28-x%2B3%29=0\"
\n" ); document.write( "To make this equation 0, the X must be -1 or 3
\n" ); document.write( "So you X-intercepts are (-1,0) and (3,0)\r
\n" ); document.write( "\n" ); document.write( "GRAPH
\n" ); document.write( "First graph the vertex (1,6)
\n" ); document.write( "Graph the X-Intercepts (-1,0) and (3,0)
\n" ); document.write( "Graph the Y-Intercept (0,3)
\n" ); document.write( "Your graph should look like this:
\n" ); document.write( "\"graph%28300%2C200%2C-5%2C5%2C-5%2C5%2C-x%5E2%2B2x%2B3%29\"
\n" ); document.write( "Hope this helps!
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