document.write( "Question 375879: 3x^2 + 9x, find x and y intercepts,range and vertex. \n" ); document.write( "

Algebra.Com's Answer #267323 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "y = 3x^2 + 9x 
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document.write( "y intercept shen x = 0
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document.write( "(0,0) the y intercept
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document.write( "x-intercepts is when y = 0
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document.write( "0 = 3x^2 + 9x
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document.write( "0 = 3x(x+3)
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document.write( "x= 0
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document.write( "x = -3
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document.write( "x-intercepts (0,0) and (-3,0)
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document.write( "the vertex form of a parabola,  where(h,k) is the vertex
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document.write( "y = 3(x^2 + 3x)
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document.write( "y = 3[(x+ 3/2)^2 - 9/4]
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document.write( "y = 3(x + 3/2)^2 - 27/4
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document.write( "vertex Pt(-3/2,-27/4)
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document.write( "Range [-27/4,)
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