a) a^2-9 = (a+3)(a-3)б) a^3+8 = (a+2)(a^2-2a+4)в) a^2b-ab^2 = ab(a-b)г) x^2+10x+25 = (x+5)(x+5) = (x+5)^2д) 9a^2-6a+1 = (3a-1)(3a-1) = (3a-1)^2
a) a^2-9 = (a+3)(a-3)
б) a^3+8 = (a+2)(a^2-2a+4)
в) a^2b-ab^2 = ab(a-b)
г) x^2+10x+25 = (x+5)(x+5) = (x+5)^2
д) 9a^2-6a+1 = (3a-1)(3a-1) = (3a-1)^2