1.(a+12)² = а² + 24а + 144
2.a²+12a+36 = (а + 6)²
3.(8b+5a)(5a-8b) = (5a+8b)(5a-8b)= 25a² - 64b²
4. a² - 25 =(a - 5)(a+5)
5.125+a³ = a³ + 5³ = (a + 5)(a² - 5a + 25)
6.(15-x)² = 225 - 30x + x²
7.(y-9)² = y² - 18y + 81
8. 1+y²-2y = (y - 1)²
9.(10x-7y)(10x+7y)= 100x² - 49y²
10. y²-0,09 = (y - 0,3)(y+0,3)
11. y³-1 = (y - 1)(y² + y + 1)
12.(40+b)- не понятное условие
13. 64-16b+b² = (b - 8)²
14.(7x-2)(2+7x) = (7x-2)(7x+2) = 49x² - 4