wyk9naj dzialanie -3(y do kwadratu-3y)​



Odpowiedź :

[tex] - 3( {y}^{2} - 3y) = - 3 {y}^{2} + 9y[/tex]

Pozdrowionka! ~Wika

[tex] - 3(y {}^{2} - 3y) = \\ = - 3y {}^{2} - 3 \times ( - 3y) = \\ = - 3y {}^{2} + 3 \times 3y = \\ = - 3y {}^{2} + 9y[/tex]