Question

Can someone check my answer? Thanks!

Solve the equation. If necessary, round your answer to the nearest tenth.



4x^2 = 121



A.


2.75, –2.75


B.


5.5, –5.5


C.


11, –11


D.


30.25, –30.25


So i think the answer is C but the result from 11*-11 is negative -121

Answer 1

@johnweldon1993 @Vocaloid

Answer 2

not C

Answer 3

what is 121/4?

Answer 4

Ok.

Answer 5

It is 30.25

Answer 6

good, now take the square root of 30.25

Answer 7

Wouldn't we take the square root first?

Answer 8

we want to divide by 4 to isolate x^2 first

Answer 9

i mean you could take the square root first but it's easier this way

Answer 10

It's 5.5

Answer 11

good, so your answer is 5.5 and - 5.5, or B

Answer 12

Ok. I see. Cool thank you. :)

Answer 13

when you take the square root of a positive number you get a positive and a negative root