Status: Waiting for your answers. Problem: Solve for the variable. Check a value if it is extraneous. √ k + 74 = k + 18 k + 74 = ( k + )2 k + 74 = k2 + k + 0 = k2 + k + 0 = ( k + )( k + ) k1 = k2 = extraneous extraneous