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Mathematics 15 Online
OpenStudy (anonymous):

help finding the cube root of something..

OpenStudy (anonymous):

\[\sqrt[3]{2x-15}=-3\]

OpenStudy (anonymous):

Here, take cube both the sides...

OpenStudy (anonymous):

\[\large (\sqrt[3]{2x-15})^3=(-3)^3\]

OpenStudy (anonymous):

so im at \[2x-15=\sqrt[3]{-3}\]

OpenStudy (anonymous):

sry i took so long to respond

OpenStudy (anonymous):

i was afk

OpenStudy (anonymous):

\[(-3)^3 = ??\]

OpenStudy (jhannybean):

\[(\sqrt[3]{2x-15})^3=(-3)^3\]\[2x-15=27\]\[2x= 42\]\[x=21\]

OpenStudy (anonymous):

oh duh, sry

OpenStudy (anonymous):

thx @waterineyes and @Jhannybean !

OpenStudy (jhannybean):

np

OpenStudy (anonymous):

What??

OpenStudy (anonymous):

@Jhannybean do you think you are right?

OpenStudy (anonymous):

\[\large (-3)^3 = 27 ??\]

OpenStudy (jhannybean):

OH! NEGATIVE 27.

OpenStudy (jhannybean):

tHANK YOU @waterineyes

OpenStudy (anonymous):

It is okay @Jhannybean

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