Question

Срочно!!!

1)(3a-4)+(8-6a)=?
2)(7x-9)-(1-2x)=?
3)8a(a+b-6)=?
4)-12y(5x - 3y + 4)=?
5)(a+6)(b-7)
6)(3a+1)(a-1)-3a=?

Answer 1

1)4-3a
2)7x-9-1+2x=9x-10
3)8a^2+8ab-48a
4)-60xy+36y^2-48y
5)ab+6b-7a-42
6)3a^2+a-3a-1-3a=3a^2-5a-1