1. а) 3x (x-8)-6 (x²+ 2x) = 3х²-24х - 6х²-12х = -3х²-36х
б) 5a (2a-b)-2a(b+5a) = 5а²-5аb - 2ab+10a² = 15a²-7ab
2. а) 2•(x-3) - 5 (x-2)=5
2х - 6 - 5х + 10 = 5
-3х+4=5
-3х=1
х = (-1/3)
1. а) 3x (x-8)-6 (x²+ 2x) = 3х²-24х - 6х²-12х = -3х²-36х
б) 5a (2a-b)-2a(b+5a) = 5а²-5аb - 2ab+10a² = 15a²-7ab
2. а) 2•(x-3) - 5 (x-2)=5
2х - 6 - 5х + 10 = 5
-3х+4=5
-3х=1
х = (-1/3)