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2009-12-01T20:10:01+01:00
3m(m-4)(5m+2)-m(2m+3)(4-3m)=
=3m(5m²+2m-20m-8)-m(8m-6m²+12-9m)=
=15m³+6m²-60m²-24m-8m²+6m³-12m+9m²=
=21m³-53m²-36m
2009-12-01T20:20:01+01:00
3m(m-4)(5m+2)-m(2m+3)(4-3m)=
(3m^2 -12m)(5m+2)-(2m^2+3m)(4-3m)=
15m^3 +6m^2-60m^2-24m-8m^2 +6m^3 -12m +9m^2=
21m^3 -53m^2 -36m
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