а) 4(m-1) - (2m+1) = 4m - 4 - 2m - 1 = 2m - 5
б) (1-3c)^2 + 3(2c+1) = 1 - 6c + 9c^2 + 6c + 3 = 9c^2 - 3c + 4
в) k(2-5k) - (2-3k)^2 = 2k - 5k^2 - 4 + 12k - 9 = -5k^2 + 14k - 13
г) (7x+4)^2 - 4x(5-2x) = 49x^2 + 56x + 16 - 20x + 8x^2 = 57x^2 + 36x + 16
а) 4(m-1) - (2m+1) = 4m - 4 - 2m - 1 = 2m - 5
б) (1-3c)^2 + 3(2c+1) = 1 - 6c + 9c^2 + 6c + 3 = 9c^2 - 3c + 4
в) k(2-5k) - (2-3k)^2 = 2k - 5k^2 - 4 + 12k - 9 = -5k^2 + 14k - 13
г) (7x+4)^2 - 4x(5-2x) = 49x^2 + 56x + 16 - 20x + 8x^2 = 57x^2 + 36x + 16