Copiati si completati plsss dau coroana
![Copiati Si Completati Plsss Dau Coroana class=](https://ro-static.z-dn.net/files/dbc/73eba1f84c997c7e096d4d484e3203f1.jpg)
a)(3a+7)^2=9a^2+42a+49
b)(6a-5b)^2=36a^2-60ab+25b^2
c)(4x-3y)^2=16x^2-24xy+9y^2