Question

Will mark brainly!

Answer 1

Answer:

16

Step-by-step explanation:

Because:

Solution by completing the square for:

2+8+0=0

Eliminate terms with 0 to get:

2+8=0

Take half of the term and square it

[8⋅12]2=16

then add the result to both sides

2+8+16=+0+16

Rewrite the perfect square on the left

(+4)2=+0+16

and combine terms on the right

(+4)2=16

Take the square root of both sides

+4=±16‾‾‾√

Cannot Simplify the Radical term (1):

isolate the x on the left side and

solve for x (1)

=−4±4

therefore (2)

=−4+4

=−4−4

which becomes

=0

=−8

Answer 2

Answer:

+ 16

Step-by-step explanation:

x² - 8x = 0

To complete the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 4)x + 16 = 0 + 16

(x - 4)² = 16 ( take square root of both sides )

x - 4 = ± $\sqrt{16}$ = ± 4 ( add 4 to both sides )

x = 4 ± 4

Then

x = 4 - 4 = 0 or x = 4 + 4 = 8