What is the solution of the equation?
2 5^square root (x+6)^3+3=19
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OpenStudy (anonymous):
not so easy to read this one
\[25\sqrt{x+6}^3+3=19\]?
OpenStudy (anonymous):
\[2 \sqrt[5]{(x+6)^{3}} +3 =19\]
OpenStudy (misty1212):
HI!!
OpenStudy (misty1212):
fifth root right?
OpenStudy (anonymous):
2^5 sqrt((x+6)^3) + 3 = 19
32 sqrt ((x+6)^3) = 16
sqrt ((x+6)^3) = 0.5
(x+6)^3 = 0.25
x+6 = 0.6299605249
x = -5.3700394751
The answer is nothing.
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OpenStudy (misty1212):
first subtract 3 from both sides
OpenStudy (anonymous):
@satellite73
OpenStudy (anonymous):
what @misty1212 said, subtract 3 as a first step
what do you get?
OpenStudy (anonymous):
Answer choices are
A.26
C.14
D.2
OpenStudy (anonymous):
A
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OpenStudy (anonymous):
yeah yeah we can get the answer
subtract 3 and get
\[2\sqrt[5]{x+6}=16\]
then divide both sides by \(2\)
OpenStudy (anonymous):
Subtract from 19 or from the whole equation itself?
OpenStudy (anonymous):
from both sides
your goal is to get \(\sqrt[5]{x+6}\) by itself
OpenStudy (anonymous):
16/2=8
OpenStudy (anonymous):
just like if you were solving
\[2x+3=19\] for \(x\) you would
a) subtract 3 then
b) divide by 2
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OpenStudy (anonymous):
idk how to divide the other side
OpenStudy (anonymous):
right
OpenStudy (anonymous):
you have it
\[\sqrt[5]{x+6}^3=8\]
OpenStudy (anonymous):
now to get \(x\)
OpenStudy (anonymous):
I just dont know what to do with the left side lol
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OpenStudy (anonymous):
I appreciate you taking your time to help me btw
OpenStudy (anonymous):
lets start with
\[\sqrt[5]{(x+6})^3=8\]
OpenStudy (anonymous):
getting there was the first two steps, you good til here (yw btw)
OpenStudy (anonymous):
\[\sqrt[5]{(x+6})^{\color{red}3}=8\] lets get rid of that \(\color{red}3\) next
it is an exponent, so to get rid of it, take the cubed root of both sides
you know what the cubed root of 8 is?
OpenStudy (anonymous):
I have no clue
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OpenStudy (anonymous):
think of a number that, when you multiply it by itself 3 times, you get 8
just guess, you have very few choices
if you get it wrong, i will tell you
OpenStudy (anonymous):
2
OpenStudy (anonymous):
right!
OpenStudy (anonymous):
so taking the cubed root of both sides gets rid of that exponent of 3 on the left and \[\sqrt[5]{(x+6)^3}=8\] becomes \[\sqrt[5]{x+6}=2\]
OpenStudy (anonymous):
now we have to get rid of the index of 5, which we do by raising both sides to the power of 5
what is \(2^5\)?
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OpenStudy (anonymous):
you can back solve it
OpenStudy (anonymous):
i didn't lose you there did it?
OpenStudy (anonymous):
Sorry catching up my computer froze
OpenStudy (anonymous):
yeah it does that
OpenStudy (anonymous):
os i mean
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OpenStudy (anonymous):
just put all the options one by one in the question and one option will satisfy the equation
OpenStudy (anonymous):
raisiing both sides to the power of 5 gives
\[x+6=2^5\] or
\[x+6=32\]
OpenStudy (anonymous):
32
OpenStudy (anonymous):
right
OpenStudy (anonymous):
now subtract 6 from both sides and you are done
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OpenStudy (anonymous):
32-6
OpenStudy (anonymous):
yup
OpenStudy (anonymous):
26
OpenStudy (anonymous):
yes
OpenStudy (anonymous):
Wow thank you, I would have never figured that out without you breaking it down
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OpenStudy (anonymous):
you are quite welcome
OpenStudy (anonymous):
I gave you a medal, well deserved
OpenStudy (anonymous):
I was right the answer is 26
OpenStudy (anonymous):
You were right, but you just gave the answer instead of explaining lol that wont help me on a test
OpenStudy (anonymous):
i prefer quick learning
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OpenStudy (anonymous):
as like in mcq's u have to save time....not to write papers for one question only