document.write( "Question 760887: f(x)=x^2-4x-5 i need help finding y intercept, x intercept, vertex, and axis of symmetry i am not grasping how to get the answer even after looking over other examples.. \n" ); document.write( "
Algebra.Com's Answer #462906 by lwsshak3(11628)\"\" \"About 
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f(x)=x^2-4x-5 i need help finding y intercept, x intercept, vertex, and axis of symmetry
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\n" ); document.write( "y=x^2-4x-5
\n" ); document.write( "To find y-intercept, set x=0, then solve for y:
\n" ); document.write( "y=0-0-5
\n" ); document.write( "y-intercept=-5
\n" ); document.write( "..
\n" ); document.write( "To find x-intercepts, set y=0 then solve for x:
\n" ); document.write( "0=x^2-4x-5
\n" ); document.write( "factor:
\n" ); document.write( "(x-5)(x+1)=0
\n" ); document.write( "x=5
\n" ); document.write( "and
\n" ); document.write( "x=-1
\n" ); document.write( "x-intercepts are 5 and -1
\n" ); document.write( "..
\n" ); document.write( "To find the vertex:
\n" ); document.write( "Complete the square to write equation in standard form:
\n" ); document.write( "y=x^2-4x-5
\n" ); document.write( "y=(x^2-4x+4)-4-5
\n" ); document.write( "y=(x-2)^2-9
\n" ); document.write( "This is an equation of a parabola that opens upward.
\n" ); document.write( "Its standard (vertex) form:y=(x-h)^2+k, (h,k)=(x,y) coordinates of the vertex
\n" ); document.write( "vertex: (2,-9)
\n" ); document.write( "axis of symmetry: x=2
\n" ); document.write( "see graph below as a visual check:
\n" ); document.write( "\"+graph%28+300%2C+300%2C+-10%2C+10%2C+-10%2C+10%2C+x%5E2-4x-5%29+\" \n" ); document.write( "
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