Ask your own question, for FREE!
Mathematics 14 Online
OpenStudy (mysticfury):

Question About Square Roots And Exponents Below Will Medal!

OpenStudy (mysticfury):

what is |dw:1459974389174:dw|

OpenStudy (halox156):

14.69

OpenStudy (mysticfury):

can you tell me how you got that?

OpenStudy (halox156):

1^3 square root -216

OpenStudy (mysticfury):

@Mehek14 @Daniellelovee @Daniee_Bruhh

OpenStudy (mysticfury):

@Atsie @HarleyQuinn98 @rebeccaxhawaii

zepdrix (zepdrix):

Hmm if we take 2, and multiply it by itself three times,\[\large\rm 2\cdot2\cdot2=8\]Here is another way we can write this,\[\large\rm 2^3=8\]This also lets us know that the `cube root` of 8 is a single 2,\[\large\rm \sqrt[3]{8}=2\]Ok let's look for other `perfect cubes`, other than 8, because that's not the one we need here.

zepdrix (zepdrix):

\[\large\rm 2^3=8\]\[\large\rm 3^3=27\]\[\large\rm 4^3=64\]\[\large\rm 5^3=125\]\[\large\rm 6^3=216\]Ah we found it!

OpenStudy (mysticfury):

okay, so is the answer 6 then? @zepdrix

zepdrix (zepdrix):

When you take the cube root of a negative number, the negative comes out as well.\[\large\rm \sqrt[3]{-216}=-\sqrt[3]{216}=-6\]

OpenStudy (mysticfury):

so -6 then is my answer? @zepdrix

zepdrix (zepdrix):

Yes.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!