Question

solve.x^2-121-0
a.0
b.-11
c.11
d.11,-11

Answer 1

\(\color{#000000 }{ \displaystyle x^2-121=0 }\)
\(\color{#000000 }{ \displaystyle x^2-121\color{red}{+121}=0\color{red}{+121} }\)

Answer 2

Do you understand that you have to still solve it @elvisiscool69? @SolomonZelman helped you to get started.

Answer 3

11^2 = 121

Answer 4

i dont get it

Answer 5

im serious about not knowing anything about math

Answer 6

Do you understand what the first post is saying?

Answer 7

He moved the 0 over to the other side to start solving for x

Answer 8

kinda

Answer 9

yea i get that part

Answer 10

Now you have x^2 = 121

Answer 11

to get rid of the squared part you have to square-root both sides

Answer 12

x^2 = 121 = 11^2
x = 11

Answer 13

The second post showed you that when you square both sides you get that the square-root of 121 is 11

Answer 14

so 121^2=11?

Answer 15

So x would equal 11

Answer 16

so its c

Answer 17

no... \[\sqrt{x ^{2}} = \sqrt{121}\]

Answer 18

x = 11

Answer 19

and yes the correct answer is C

Answer 20

life saver!!!!

Answer 21

11

Answer 22

Congratulations.

Answer 23

@SolomonZelman has shown you the most simplest way of doing the problem. The only thing you need to understand is that to remove the 2 on top of the x, you have to square-root the x. And what you do to one side, you have to do to the other. So when you square-rooted x, you also square-rooted 121, and got your final answer; 11