125-z^3 = 5^3 - z^3 = (5 - z)(25 + 5z + z^2)
1)6(х+у)
4(5а-b)
x(c+d)
2)(x+a)(x+a)
(2a-5b)(2a-5b)
(3p-8)(3p-8)
3)7xy(2x-y+3xy)
20a{в четвертой} b³(2+4b-3ab²)
4)2m(a-b) - 3n(a-b) = (a-b)(2m-3n)
(a-14)(a-14-7) = (a-14)(a-21)
<span>2555:(13^2+14^2)+35=2555:365+35=7+35=42</span>