Упростите. (3a+5)•(3a-6)+3=

Question

Упростите. (3a+5)•(3a-6)+3=

Answer 1

(3a+5)*(3a-6)+3=9a^2-18a+15a-30+3=9a^2-3a-27=3(3a^2-a-9)

Answer 2

Ответ :
(За+5)•(3а-6)+3= 3а+5•За-6+4= (3а•За)+(5•(-6)•3)= 9а+(-90)