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Efectuati: b) - 9,5a^2+7,75a^2-2,35a^2+(a^2-0,3a^2-0,7a^2)

Răspuns :

Daca nu intelegi ceva, imi spui :) Sper ca te-am ajutat!
Vezi imaginea MIHAILADANIEL33
-9,5a^2+7,75a^2-2,35a^2+(2a-0,09a-0,49a)=
=-9,5a^2+7,75a^2-2,35a^2+1,42a=
=-90,25a+59,90a-5,52a+1,42a=
=157,09a