Question

решить : (3а-4б)(3а+4б) =?
(-6а-5а)(6а-5б)=?

Answer 1

(3а-4б)(3а+4б)=9а²-16б²

(-6а-5а)(6а-5б)=-36а²+30аб-30аб+25аб=-36а²+25аб