Question

Упростить вырожение 3b+(5a-7b) , (5a-3b)-(2+5a-3b) , 3(8a-4)+6a

Answer 1

3b+(5a-3b)=3a+2b
(5a-3b)-(2+5a-3b)=5a-3b-2-5a-3b=-2
3(8a-4)+6a=24a-12+6a=30a-12

Answer 2

1 . 5a
2. (5a-3b)(-2-5a+3b)=
=-10a-25a²+15ab+6b+15ab-9b²=
=-25a²-10a+30ab-9b²
3. 3(8a-4)+6a=24a-12+6a=30a-12