document.write( "Question 366629: Graph the quadratic funtion f(x)=-5(x-2)^2+9. State the ordered pairs representing the x-intercept(s), y-intercept(if any), and the vertex of the parabola. \n" ); document.write( "

Algebra.Com's Answer #261441 by mananth(16946) $\"\"$ $\"About$

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-5(x^2-4X+4)+9
\n" ); document.write( "=-5x^2+20x-20+9
\n" ); document.write( "=-5x^2+20x-11
\n" ); document.write( "vertex x co-ordinate = -b/2a
\n" ); document.write( "=-20/2*-5
\n" ); document.write( "=2
\n" ); document.write( "plug the value of 2 in the equation
\n" ); document.write( "-20+40-11
\n" ); document.write( "=9
\n" ); document.write( "Vertex ( 2,9)
\n" ); document.write( "...
\n" ); document.write( "-5x^2+20x-11
\n" ); document.write( "discriminant = 180
\n" ); document.write( "x1= (-20+sqrt(180)/-10
\n" ); document.write( "= 0.65
\n" ); document.write( "xintercept = (0.65,0)
\n" ); document.write( "x2=(-20-sqrt(180))/-10
\n" ); document.write( "x2= 3.34
\n" ); document.write( "x intercept = (3.34,0)
\n" ); document.write( "...
\n" ); document.write( "for y intercept plug x=0
\n" ); document.write( "y= -11 the y intercept.
\n" ); document.write( "...
\n" ); document.write( " $\"graph%28500%2C500%2C-1%2C4%2C-15%2C10%2C%28-5x%5E2%2B20x-11%29%29\"$
\n" ); document.write( "...
\n" ); document.write( "m.ananth@hotmail.ca
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