document.write( "Question 90212: Please help me!!!!
\n" ); document.write( "My problem says to graph each quadratic equation and state the vertex and intercepts. The equation is y=x^2+4x. I have to have at least 4 intercepts. Thank you so much!! \n" ); document.write( "

Algebra.Com's Answer #65528 by stanbon(75887) $\"\"$ $\"About$

You can put this solution on YOUR website!
My problem says to graph each quadratic equation and state the vertex and intercepts. The equation is y=x^2+4x. I have to have at least 4 intercepts.
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\n" ); document.write( "y=x^2+4x
\n" ); document.write( "Put in vertex form by completing the square on the x-terms:
\n" ); document.write( "y = x^2+4x+(4/2)^2 - (4/2)^2
\n" ); document.write( "y = x^2+4x+4 - 4
\n" ); document.write( "y = (x+2)^2 -4
\n" ); document.write( "y+4 = (x+2)^2
\n" ); document.write( "-------------
\n" ); document.write( "Vertex at (-2,-4)
\n" ); document.write( "y-intercept (0,0)
\n" ); document.write( "x-intercepts:
\n" ); document.write( " x^2+4x=0
\n" ); document.write( "x(x+4)=0
\n" ); document.write( "x=0 or x=-4
\n" ); document.write( "===================
\n" ); document.write( " $\"graph%28400%2C300%2C-10%2C10%2C-10%2C10%2Cx%5E2%2B4x%29\"$
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H. \n" ); document.write( "

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