1-(1) (2x 3)\'2 = 2x\'2 12x 9 / (2) (3y-1)\'2 = 9y\'2-6y 1 / (3) (3x-2y)\'2 = 9x\'2-12xy 4y\'2 / (4) (2a 1/2b)\'2 = 4a\'2 2ab 1/4b\'2 / (5)(-5x 2)\'2 = 25x\'2-20x 4 / (6) (-2x-3y)\'2 = 4x\'2 12xy 9y\'2 / (7) (-4a 1/2b)\'2 = 16a\'2-4ab 1/4b\'2 / (8) (2/5a 1/2b)\'2 = 4/25a\'2 2/5ab 1/4b\'2 / 2-(1) (x 1)(x-1) = x\'2-1 / (2) (-2x 3)(2x 3) = -4x\'2 9 / (3) (3x 4)(3x-4) = 9x\'2-16