Question

What number must you add to complete the square? x^2 + 4x = 7

Answer 1

x^2+2(2)(x)+2^2 - 2^2= 7

Answer 2

what do i add to complete the square ? what #?

Answer 3

@annas when you put it like that, it's hard to understand for me as well lol.

Answer 4

are you sure

Answer 5

\[\pm 4\]

Answer 6

\[x^2 + 4x + 4 = 7 + 4\] better version of anna

Answer 7

because when you complete a square like this you need to both add and subtract

Answer 8

@nphuongsun93 oooh ok now it makes sense lol.

Answer 9

@LalanaG123 got the point i m trying to explain

Answer 10

\[(a+b)^2 = a^2 + 2ab + b^2\]