Question

to solve by completing the square what value should you add to the equation?
x^2+16x=-8

Answer 1

56 i believe.
rewrite: x^2 + 16x + 8 = 0
16 / 2 =8
8^2 = 64

so you need to add 64, but you already added 8.

64-8 = 56

Answer 2

ok, thanks :)