1) a⁴-4a²b+4b²
2) 125x³+75x²+15x+1
3) 144a²-24a+1-1= 144a²-24a
4) 4a²+20a+25-20a-25= 4a²
5) 5a-a²+15-3a-a²+2a-1= -2a²+4a+14
1.
(а²-2b)² = а⁴ - 4а²b + 4b²,
2.
(5х+1)³ = 125x³ + 75х² + 15х + 1,
3.
(12а-1)²-1 = 144а² - 24а + 1 - 1 = 144а² - 24а,
4.
(2а+5)²-5(4а+5) = 4а² + 20а + 25 - 20а - 25 = 4а²,
5.
(а+3)(5-а)-(а-1)² = 5а - а² + 15 - 3а - а² + 2а - 1 = -2а² + 4а + 14
