Question

i need help:

Answer 1

with...

Answer 2

\[\sqrt{4x-y}=3d\]

Answer 3

solve for x

Answer 4

You can square both sides, to start with.

Answer 5

kk

Answer 6

oh do you just need x by itself? i thought you wanted like actual values. ok phew

Answer 7

lol

Answer 8

getting x by itself is getting the actual values.

Answer 9

no i meant like a numerical value

Answer 10

it would be a numerical value. Determined by unknown d and variable y.

Answer 11

ok

Answer 12

i have know idea what to do

Answer 13

did you square both sides?

Answer 14

ya

Answer 15

what did you get

Answer 16

umm idk

Answer 17

what do you mean? well i got 4x-y=9d^2

Answer 18

\[\sqrt{4x-y}=3d\]ummm

Answer 19

i need to solve for x

Answer 20

well squaring both sides would get you (squareroot 4x-y) ^2 = (3d)^2

Answer 21

how do you get ^2

Answer 22

and so now you're squaring a square root. it's like (squareroot of 4)^2
square root of 4 is 2 right? so it would be 2^2 which is 4 again.
so basically if you're squaring a square root, you're not really doing anything so the square root and square cancel each other out if that makes sense

Answer 23

oh ^2 means sqaure

Answer 24

oo

Answer 25

so you get how to square both sides then?

Answer 26

idk this is my first time doing this or a problem like this

Answer 27

oh ok well have you done questions like this: x^2 = 25

Answer 28

ya

Answer 29

that would be 5 ya

Answer 30

yeah this question is pretty much the same thing

Answer 31

oo

Answer 32

so in the x^2=25 you basically square rooted both sides.
so square root of x^2 = square root of 25
x=5
but it in this question you have to square both sides, give it another try

Answer 33

so you square the 3d

Answer 34

yup and also the sqrt 4x-y

Answer 35

so would it be 9d

Answer 36

9d^2 but yeah

Answer 37

kk then what do i do

Answer 38

did you also square the other side?

Answer 39

so would it be 16x-y^2

Answer 40

no because remember its squareroot of 4x-y already. so squaring it gets you squareroot of 4x-y times squareroot of 4x-y which is just 4x-y

Answer 41

so it stays the same

Answer 42

yeah

Answer 43

can you solve it now? you just have to get x by itself

Answer 44

would the square roots still be there

Answer 45

no

Answer 46

k

Answer 47

so it would look like 4x-y=9d

Answer 48

ok well you should also probably ask your teacher this too cause in math it's really important to know why things happen

Answer 49

yeah exactly

Answer 50

kk i dont have a teacher

Answer 51

oh...how does that work?

Answer 52

well my mom is my teacher but my mom is in the hospital

Answer 53

ohh ok

Answer 54

ya

Answer 55

how do i get x by it's self

Answer 56

sorry if you dont mind me asking, what grade are you in? like technically, like your age

Answer 57

14 in 9

Answer 58

so in an equation whatever you do to one side, you have to do to another. so you could add y to both sides which would get you 4x by itself

Answer 59

sorry again, (none of my business i know) but why don't you go to school?

Answer 60

so what i got was 4x=9dy drama and lot of fighting

Answer 61

that's right except that it's d^2 not just d

Answer 62

oh, well i'm sorry. hope it works out, whatever it is

Answer 63

oo k

Answer 64

thank you well we are having hard times my bf just got put in jail for a year

Answer 65

aww :/ Imagine all the people, living life in peace... *swaying to the awesome music* sorry, only thing i could think of

Answer 66

It's good that you're doing math and stuff though

Answer 67

lol thank you hes only 15

Answer 68

i thought you couldn't go to jail unless you're an adult? well i suppose different countries

Answer 69

ya well i live in hawaii so there is only two jails and one prison and a whole lot of bad kids they do what they have to

Answer 70

ohh the kids do what they have to?

Answer 71

ya well know that i look back at what happened it is his own problem

Answer 72

oh. well anyways good luck. time heals

Answer 73

ya kk so know what do i do with 4x=9d^2y

Answer 74

oh i thought you'd solved it. well think about, this time entire time you've been doing things to both sides. how would you get x by itself this time?

Answer 75

you divide 4 on both sides

Answer 76

because what happens on one side you do to the other

Answer 77

yeah! exactly! :D good job

Answer 78

thank you so it would be 2.25 d^2y

Answer 79

wait what? so i had 4x=9d^2 + y
and so x= (9d^2 + y)/4

Answer 80

ya and that is what i did then i divided 9/4=2.25