document.write( "Question 56536: Complete the follwing function for g(x)=-4x^2+16x+19 Generate the graph and find the Vertex and x&y intercepts for the graph, show all work \n" ); document.write( "
Algebra.Com's Answer #38368 by funmath(2933)\"\" \"About 
You can put this solution on YOUR website!
I think you forgot an x, so I plugged it in.
\n" ); document.write( "Complete the follwing function for \"g%28x%29=-4x%5E2%2B16x%2B19\" Generate the graph and find the Vertex and x&y intercepts for the graph, show all work.
\n" ); document.write( "Your quadratic equation is in standard form:\"highlight%28f%28x%29=ax%5E2%2Bbx%2Bc%29\". Your a=-4, b=16, c=19 (note: a is negative, so your parabola opens down.)
\n" ); document.write( "First find the axis of symmetry, which is also the x value of the vertex using the formula \"highlight%28x=-b%2F2a%29\"
\n" ); document.write( "\"x=-%2816%2F%282%28-4%29%29%29\"
\n" ); document.write( "\"x=-16%2F-8\"
\n" ); document.write( "\"x=2\" This is your axis of symmetry and x value of the vertex, to find the y value of the vertex find g(2):
\n" ); document.write( "\"g%282%29=-4%282%29%5E2%2B16%282%29%2B19\"
\n" ); document.write( "\"g%282%29=-4%284%29%2B16%282%29%2B19\"
\n" ); document.write( "\"g%282%29=-16%2B32%2B19\"
\n" ); document.write( "\"g%282%29=35\"
\n" ); document.write( "Your vertex is (2,35). Plot that point.
\n" ); document.write( "The y-intercept is found by letting x =0 and solve for y:
\n" ); document.write( "\"g%280%29=-4%280%29%5E2%2B16%280%29%2B19\"
\n" ); document.write( "\"g%280%29=19\"
\n" ); document.write( "The y-intercept is (0,-19).
\n" ); document.write( "The x-intercept is found by letting g(x)=0 and solving for x:
\n" ); document.write( "\"0=-4x%5E2%2B16x%2B19\"
\n" ); document.write( "This can't be factored, so use the quadratic formula to solve it:
\n" ); document.write( "\"highlight%28x=%28-b%2B-sqrt%28b%5E2-4ac%29%29%2F%282a%29%29\"
\n" ); document.write( "\"x=%28-%2816%29%2B-sqrt%28%2816%29%5E2-4%28-4%29%2819%29%29%29%2F%282%28-4%29%29\"
\n" ); document.write( "\"x=%28-16%2B-sqrt%28256%2B304%29%29%2F-8\"
\n" ); document.write( "\"x=%28-16%2B-sqrt%28560%29%29%2F-8\"
\n" ); document.write( "\"x=%28-16%2B-sqrt%2816%29%2Asqrt%2835%29%29%2F-8\"
\n" ); document.write( "\"x=%28-16%2B-4%2Asqrt%2835%29%29%2F-8\"
\n" ); document.write( "\"x=%28-16-4%2Asqrt%2835%29%29%2F-8\" and \"x=%28-16%2B4%2Asqrt%2835%29%29%2F-8\"
\n" ); document.write( "\"x=-4%284%2Bsqrt%2835%29%29%2F%28-4%2A2%29\" and \"x=-4%284-sqrt%2835%29%29%2F%28-4%2A2%29\"
\n" ); document.write( "\"x=%284%2Bsqrt%2835%29%29%2F2\" and \"x=%284-sqrt%2835%29%29%2F2\"
\n" ); document.write( "x~~4.958039892 and x~~-.9580398915
\n" ); document.write( "The program is not responding to my attempts to regraph this.
\n" ); document.write( "Plot the vertex(2,35), the y-int (0,19), the x-int (-.95,0) and (4.95,0) and connect the dots. You should have an upside down parabola.
\n" ); document.write( "Happy Calculating!!!\r
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