Question

Solve x2 + 8x − 3 = 0 using the completing-the-square method.

Answer 1

divide coefficient of x by 2
8 / 2 = 4
Now we write x^2 + 8x in the 'complete the square form' :-

x^2 + 8x = (x + 4)^2 - 16

Can you see why its -16?

Answer 2

Yes? , No?

Answer 3

yes thank u!

Answer 4

ok so
(x + 2)^2 - 16 - 3 = 0
(x+ 4)^2 = 19

now take the square root of both sides

Answer 5

x + 4 = +/- sqrt19

now subtract 4 from both sides and you have the solution