а) \[25a^2 - 9 = (5a)^2 - 3^2 = (5a - 3)(5a + 3)\]
б) \[-3x^2 + 6x - 3 = -3(x^2 - 2x + 1) = -3(x - 1)^2\]
в) \[8x^3 + y^3 = (2x)^3 + y^3 = (2x + y)(4x^2 - 2xy + y^2)\]
г) \[9x^2 - 25 = (3x)^2 - 5^2 = (3x - 5)(3x + 5)\]
д) \[-3a^2 + 6a - 3 = -3(a^2 - 2a + 1) = -3(a - 1)^2\]
e) \[y^3 - 8x^3 = y^3 - (2x)^3 = (y - 2x)(y^2 + 2xy + 4x^2)\]
Ответ: