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2,5m.0,4m.(-2m)²-2.(2m²)²+m^4-(-3m)^4

(.)=ori.


Răspuns :

2,5m×0,4m×(-2m)²-2×(2m²)²+m⁴-(-3m)⁴=
=
1m²×(-2m)²-2×4m⁴+m⁴-81m⁴=
=-2m⁴-8m⁴+m⁴-81m⁴=-90m⁴