a) z^2 + 3z + 2z + 6 - z^2 - z = 3z + 6
б) c^2 - 10c - 5c + 50 + 3c^2 + 15c = 4c^2 - 2c + 50
в) u^2 + uv - vu + v - u - v + 1 = u^2 - u
a) z^2 + 3z + 2z + 6 - z^2 - z = 3z + 6
б) c^2 - 10c - 5c + 50 + 3c^2 + 15c = 4c^2 - 2c + 50
в) u^2 + uv - vu + v - u - v + 1 = u^2 - u