Question

What number must you add to complete the square?
x^2+12x=-5

Answer 1

take half of the x coefficient to get 12/2 = 6

then square this to get 6^2 = 36

Answer 2

so you must add 36 to both sides

Answer 3

72???

Answer 4

the answer is 36 huh

Answer 5

how are you getting 72?

Answer 6

i thought u had to add 36+36=72

Answer 7

x^2 + 12x + 5 = 0

x^2 + 12x = -5

Now, halve the linear term (12), square it and add it to both sides

x^2 + 12 + 36 = -5 + 36

factor on the left, gather terms on the right

(X + 6)2 = 31

(X + 6)2 - 31 = 0
==============vertex form.... (- 6, - 31)
========================--------------vertex

And that number added is 36

Answer 8

so the answer is 36 right buddies

Answer 9

yes