а) 3m - 3n + m^2 - n^2 = 3(m - n) + (m + n)(m - n) = (3 + m + n)(m - n)
б) a^2 + 5a - b^2 + 5b = a^2 + 5a + 5b - b^2 = (a^2 + 5a) + (5b - b^2) = a(a + 5) - b(b - 5)
в) 9x^2 - a^2 + 9x - 3a = (3x + a)(3x - a) + 3(3x - a) = (3x + a)(3x - a + 3)
г) p^2 + 5p - 4q^2 + 10q = p^2 + 5p + 10q - 4q^2 = (p^2 + 5p) + (10q - 4q^2) = p(p + 5) - 2q(2q - 5)
а) 3m - 3n + m^2 - n^2 = 3(m - n) + (m + n)(m - n) = (3 + m + n)(m - n)
б) a^2 + 5a - b^2 + 5b = a^2 + 5a + 5b - b^2 = (a^2 + 5a) + (5b - b^2) = a(a + 5) - b(b - 5)
в) 9x^2 - a^2 + 9x - 3a = (3x + a)(3x - a) + 3(3x - a) = (3x + a)(3x - a + 3)
г) p^2 + 5p - 4q^2 + 10q = p^2 + 5p + 10q - 4q^2 = (p^2 + 5p) + (10q - 4q^2) = p(p + 5) - 2q(2q - 5)