(4a-b)²=(4a)²-2*4a*b+b²=16a²-8ab+b²
(4a-b)³=(4a)³-3*(4a)²*b+3*4a*b²-b³=64a³-48a²b+12ab²-b³
(4a+b)³=(4a)³+3*(4a)²*b+3*4a*b²+b³=64a³+48a²b+12ab²+b³
1)(2в+3а)(3а-2в) =6ав+9а²-4в²-6ав=9а²-4в²
<span>2)3а(а-3)-(а-4)^2=3а</span>²-9а-(а²-8а+16)=3а²-9а-а²+8а-16=4а²-а-16