document.write( "Question 666136: 1. Find the peaks and the troughs (= interior local maxima and minima) of the
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Algebra.Com's Answer #414301 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "Hi,
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document.write( "y = x^3 - 10.5x^2 + 30x +20
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document.write( "y' = 3x^2 - 21x + 30
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document.write( "When Slope = 0, maxima and minina pts are achieved at x.
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document.write( " 3x^2 - 21x + 30 = 0
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document.write( "  x^2 - 7x + 10 = 0
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document.write( " (x-2)(x-5) = 0  x = 2 or x = 5
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document.write( "f(2) = 46   maxima
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document.write( "f(5) = 32.5 minima
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