Question

Help xx

Answer 1

14/2 = 7 = 7^2 = 49

x^2 + 14x + 49 = -7 + 49
(x + 7)^2 = 42

x + 7 = ±√42

x = -7 ±√42 <-- (simplify that to your teacher's specification) and put into "x = " form

Answer 2

Here is a useful example from 'Purplemath' to help you answer the question

Answer 3

the answer is
(x + 7)^2 = 42 formula for completing the square is (b/2)^2

Answer 4

HI!!

Answer 5

you got this? the question is only "what to add?"
half of 14 is 7, 7 squared is 49
49 is your answer, that is all...

Answer 6

i think mam is correct the final answer is 49 :)