Question 201700
(x+2)(x-3)(x+4)
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use  FOIL  first
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(x+2) ( x^2 +4x -3x -12)
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(x+2) ( x^2 + 1x -12)
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now  use  distribution
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x(x^2 +x -12) +2 ( x^2 +x -12)
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x^3 +x^2 -12x +2x^2 +2x -24
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x^3 +3x^2 -10x -24 
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checking,,,if  x=0,,,  original  and  answer  = -24,,ok
if  x=1,,,both  = -30,,,ok