what is it important to simifly expressions
If you have x^3-2x^3+2x^2-3x^2+4x^2+7, it is better to write it as( simplify) -x^3+3x^2+7 , because if you want to evaluate it for x=2, it is easier. Also , [ when you want to solve x^2-5x+6=0 if you write this as (x-3)(x-2)=0 then we can solve x=3 and x=2 easily. Here, we factor it (which is another simplification). ]
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