Status: Waiting for your answers. Problem: Solve for the variable. Check a value if it is extraneous. √ z + 45 = z + 15 z + 45 = ( z + )2 z + 45 = z2 + z + 0 = z2 + z + 0 = ( z + )( z + ) z1 = z2 = extraneous extraneous