What is (Math question)?

2009-06-05 10:42 am

-27^2/3=

更新1:

sweet though this doesn't make sense then...cause the answers are a.-81 b.81 c.9 d-9 What?

更新2:

yes to parenthese, how ever you spell it :3

回答 (6)

2009-06-05 12:28 pm

✔ 最佳答案

(-27)^(2/3)
= ³√[(-27^2)]
= ³√729
= ³√(9^3)
= 9
(answer c)

👍 0 👎 0

2009-06-05 5:54 pm

-27^2/3 = -(3^2) = -9.
But if question is: (-27)^2/3, then (-27)^2/3 = (-3)^2 = 9.

👍 1 👎 0

2009-06-05 6:31 pm

[(-27)^1/3]^2=(-3)^2=9
c is correct.

👍 0 👎 0

2009-06-05 5:52 pm

Do you want the cube root of -27 squared or -27 squared divided by 3?

👍 0 👎 0

2009-06-05 5:50 pm

-27^(2/3)= -9

👍 0 👎 0

2009-06-05 5:48 pm

It depends

If the -27 is in parentheses (-27) then the answer is 243

If there are no parentheses then the answer is -243

👍 0 👎 0