C-9, 1Bap b₂ (N14) 11 al-30?fa+ga²-2) = =

a)

$$-3a^2\cdot(a+9a^2-2)=$$

$$-3a^2 \cdot a -3a^2\cdot 9a^2-3a^2\cdot (-2)=$$

$$-3a^3-27a^4+6a^2=$$

$$-27a^4-3a^3+6a^2$$

Ответ: $$-27a^4-3a^3+6a^2$$