document.write( "Question 405529: what is the range of the function y=x^2-10x+21 ?? \n" ); document.write( "

Algebra.Com's Answer #286415 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi
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document.write( "Using the vertex form of a parabola,  where(h,k) is the vertex
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document.write( "y=x^2-10x+21  |completing square to put into vertex form
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document.write( "y = (x-5)^2 -25 + 21
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document.write( "y = (x-5)^2 - 4 |Vertex is Pt(5,-4) Parabola opens upward (a>0)
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document.write( "Range is [-4, ∞)
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