---

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