Question

Question in the screenshot please help!

Answer 1

A. 16
B. 8
C. 2
D. 4

Answer 2

Fist divide the coefficient of x ( which is 4) by 2.
then square the result.

what do you get?

Answer 3

what is 4/2 ?

Answer 4

I'm sure you can do that!

Answer 5

2

Answer 6

@welshfella

Answer 7

right now 2^2 = 4 right?

Answer 8

Yes

Answer 9

so we put 2 in the parentheses and square it
(x + 2^2

then subtract the 4 we just worked out :-

(x +2)^2 - 4 = 3

now add 4 to both sides

(x + 2)^2 = 7

and we have completed the square!

Answer 10

So your answer is D

Answer 11

Thanks for the explanation and help @welshfella

Answer 12

yw

Answer 13

if you have anything like
x^2 - 8x for example

you divide the -8 by 2 so -4 goes into the squared parentheses and - 4^2 ( = -16) goes outside so in this case we have

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

Answer 14

Will this be the same steps?

Answer 15

yes exactly the same

Answer 16

fist you divide + 8 by 2

Answer 17

4

Answer 18

RIGHT NOW SQUARE THAT

Answer 19

16

Answer 20

- and thats the number you add

Answer 21

(x + 4)^2 - 16 = 15
(x + 4)^2 - 16 + 16 = 15 + 16
(x + 4)^2 = 15 + 16 = 31

Answer 22

(x + 4)^ = 31

the number youi add is 16

Answer 23

Thanks very much i understand this now thanks!

Answer 24

good