Rezolvati ecuatiile: a) (x+2)² = 4(x+3) ; (x-3)² = 3(9-2x) b) (2x+1)² = 4(x+7) ; (2x-3)² = 3(9-4x) c) (2x+1)² - 3(x+2)² = 2(7-4x) d) (3x-2)² - 2(2x+5) = 2(9-26x)