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Ответ

Ответ дан
Trey55

Ответ:

-2а²+9.

Объяснение:

(а-3)²-3а(а-2) = а²-6а+9-3а²+6а = -2а²+9

Ответ

Ответ дан
denisstretyakov

displaystyle tt (a-3)^2-3a(a-2)=a^2-2cdot acdot3^2-3acdot a-3acdot(-2)=a^2-6a+9-3a^2+6a=underline{bold{-2a^2+9}}

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