document.write( "Question 448483: Find the x-intercepts of the graph and compare them with the solutions of the corresponding quadratic equation y=x^2-9x+18.
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Algebra.Com's Answer #308610 by ewatrrr(24785)\"\" \"About 
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document.write( "Hi
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document.write( "y=x^2-9x+18
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document.write( "Note: the vertex form of a parabola, \"y=a%28x-h%29%5E2+%2Bk\" where(h,k) is the vertex
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document.write( "y=x^2-9x +18   |Completing the square
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document.write( "y = [(x-4.5)^2 - 20.25] +18
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document.write( "y = (x-4.5)^2 - 2.25   Vertex(4.5,-2.25) a = 1 > 0 parabola opens upward
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document.write( "x-intercepts when y = 0 are also the solutions for the quadratic equation
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document.write( " (x-4.5)^2 = 2.25
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document.write( "    x-4.5 = ± \"sqrt%282.25%29\"
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document.write( "      \"x+=+4.5+%B1+1.5%29\"  x = 6 or x = 3
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document.write( "OR
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document.write( " x^2 - 9x + 18 = 0  Using Quadratic Formula to solve for x
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document.write( "\"x+=+%28-b+%2B-+sqrt%28+9%29%29%2F%282%2Aa%29+\" 
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document.write( "\"x+=+4.5+%2B-+3%2F2%29\" 
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document.write( "   x = 4.5 ± 1.5   x = 6 or x = 3
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