I need help solving these problems pleaes and thank you. I also need step by step (show your work). Correct answers only please!!

1)

x^2 + 6x + 9  = 0

x^2 + 6x  =  -9

Take (1/2) of 6  = 3....square it .....= 9......add to both sides

x^2 + 6x + 9  = -9 + 9

x^2 + 6x + 9  =  0  .....notice that this is what we started with!!!.....factor the left side

(x +3)^2  =  0        take the square root

x + 3  = 0              subtract 3 from both sides

x  = -3

2) 

2x^2 + 6  = 24       subtract 6 from both sides

2x^2  = 18             divide both sides by 2

x^2  =  9                take both roots

x  = ±√9

x = ± 3