document.write( "Question 634613: The value of c for which the vertex of the parabola y=x^2+6x+c will lie on the x-axis is _____? \n" ); document.write( "

Algebra.Com's Answer #399738 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "y=x^2+6x+c
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document.write( "The value of c for which the vertex of the parabola will lie on the x-axis
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document.write( "y = (x - 3)^2 - 9  + c   |comleting the Square to put into Vertex form for:  V(-3,0)
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document.write( "the vertex form of a Parabola opening up(a>0) or down(a<0),  
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document.write( "where(h,k) is the vertex
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document.write( "  c = 9    and 
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