Question

√2x - 4 = 8

Answer 1

Is that the sqrt of whole 2x - 4?

Answer 2

Yeah

Answer 3

Okay. I'll make you work it through. Square both sides first.

Answer 4

is the answer 6?

Answer 5

What is the square of \(\sqrt{2x - 4}\)? Obviously 2x - 4, as I told you yesterday.

Answer 6

2x - 4 = 64
2x = 68
x = 34

Answer 7

what about the = 8 ?

Answer 8

I've squared both sides.

Answer 9

radical 2x - 4 = 8

Answer 10

it becomes 2x = 12 right ?

Answer 11

No no

Answer 12

Square BOTH SIDES

Answer 13

so the answer is 12?

Answer 14

\(\Large \color{Black}{\Rightarrow \cancel {\sqrt{2x - 4}}^\cancel2 = 8^2 }\)

\(\Large \color{Black}{\Rightarrow 2x - 4 = 64 }\)

Solve it now.

Answer 15

What is 8 squared?

Answer 16

64

Answer 17

Proceed

Answer 18

Whenever we have the square of a square root, they get cancelled out. A general way to say this is:

\(\Large \color{Black}{\Rightarrow \sqrt{x}^2 = x }\)

Answer 19

okay

Answer 20

I've answered it already though :|

Answer 21

so it's 64?

Answer 22

Wait a second.

\(\Large \color{Black}{\Rightarrow 2x - 4 = 64}\)

x cannot equal 64 brotha.

Answer 23

I mean 36

Answer 24

\(\Large \color{Black}{\Rightarrow 2x = 68 }\)
Now?

Answer 25

Wanna twid again?

Answer 26

you divide so you get 36

Answer 27

What is 68/2?

Answer 28

34 oops

Answer 29

Yepp

Answer 30

Thank you :)

Answer 31

:) :) You might wanna twid with me

Answer 32

can you help me with this other problem on twid?

Answer 33

Ok...invite me

Answer 34

I have no idea how to do that tbh

Answer 35

Okay I'll do

Answer 36

Come to this link

Answer 37

http://www.twiddla.com/849724

Answer 38

Lol smooth parth ;D