document.write( "Question 367608: Consider the quadratic function f(x) = x2 + 6x + 18. Determine whether there is a maximum or minimum value and find that value. \n" ); document.write( "

Algebra.Com's Answer #262069 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi, 
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document.write( "*Note: the vertex form of a parabola,  where(h,k) is the vertex
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document.write( "f(x) = x^2 + 6x + 18
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document.write( "completing the square
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document.write( "f(x) =(x+3)^2 -9 + 18 = 1*(x+3)^2 + 9
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document.write( " a = 1, a positive number, therefore parabola opens upward
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document.write( "vertex is (-3,9) this is a minimum value.
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