Put the steps in order to solve the following problem by completing the square in the correct order 2? + 18x - 72 = 0 1. (x + 9)^2=153
2. x = -9 plus or minus 3 square root of 17
3. x + 9 = plus or minus the square root of 153
4.x = -9 plus or minus the square root of 153
5. x^2 + 18x+ 81 = 153
6. x^2 + 18x = 72