1) (2x^2 - 6x) / 2x = 2x(x - 3) / 2x = x - 32) (a + 1) / (a^2 + 2a + 1) = a + 1 / (a + 1)^2
1) (a + 4) / (3a) - (a - 2) / a^2 = (a + 4) / (3a) - (a - 2) / a^2 = (a^2 + 4a - 3a + 2) / 3a * a^2 = (a^2 + a + 2) / 3a^22) (3x) / (x + 3) + (3x) / (x - 3) = 3x(x - 3) / (x + 3)(x - 3) + 3x(x + 3) / (x + 3)(x - 3) = (3x^2 - 9x + 3x^2 + 9x) / (x^2 - 9) = 6x^2 / x^2 - 93) (9x^2) / (3xy - y) - (y) / (3x - y) = 9x^2 / 3y(x - 1) - y / (3x - y) = (9x^2 - y(3x - y) / 3y(x - 1)(3x - y) = (9x^2 - 3xy + y^2) / 3y(x - 1)(3x - y)4) (a - 3b + 6ab) / (a - 3b) = a(1 + 6b) / (a - 3b)
1) (2x^2 - 6x) / 2x = 2x(x - 3) / 2x = x - 3
2) (a + 1) / (a^2 + 2a + 1) = a + 1 / (a + 1)^2
1) (a + 4) / (3a) - (a - 2) / a^2 = (a + 4) / (3a) - (a - 2) / a^2 = (a^2 + 4a - 3a + 2) / 3a * a^2 = (a^2 + a + 2) / 3a^2
2) (3x) / (x + 3) + (3x) / (x - 3) = 3x(x - 3) / (x + 3)(x - 3) + 3x(x + 3) / (x + 3)(x - 3) = (3x^2 - 9x + 3x^2 + 9x) / (x^2 - 9) = 6x^2 / x^2 - 9
3) (9x^2) / (3xy - y) - (y) / (3x - y) = 9x^2 / 3y(x - 1) - y / (3x - y) = (9x^2 - y(3x - y) / 3y(x - 1)(3x - y) = (9x^2 - 3xy + y^2) / 3y(x - 1)(3x - y)
4) (a - 3b + 6ab) / (a - 3b) = a(1 + 6b) / (a - 3b)