Status: Waiting for your answers. Problem: Solve for the variable. Check a value if it is extraneous. √ z - 2 = z - 4 z - 2 = ( z + )2 z - 2 = z2 + z + 0 = z2 + z + 0 = ( z + )( z + ) z1 = z2 = extraneous extraneous