Status: Waiting for your answers. Problem: Solve for the variable. Check a value if it is extraneous. √ u + 10 = u + 4 u + 10 = ( u + )2 u + 10 = u2 + u + 0 = u2 + u + 0 = ( u + )( u + ) u1 = u2 = extraneous extraneous