square roots question

[flew62999]

if there is a number outside of a square root...do I multiply the square times that #...

for example:

the sqaure root of -64 with a 3 on the outside of the symbol, would that equal 8 (3) = -24

 

[stapel]

That depends on what you mean by "the outside". Are you talking about a full-sized number multiplied on the radical, or are you referring to the index of the radical (in which case, the "3" would indicate that this is not a "square root" at all)?

Eliz.

Thinkquest: Powers and Roots
Mathwords: Radical Rules

 

[Guest]

The number outside refers to the value of the root...ie a 2 is a square root, a 3 is a cube root etc.

so if a 3 is outside(in front of)the root symbol then it means what value cubed gives this result...

 

[flew62999]

the 3 is not a whole number on the outside of the sq rt...so does this mean that I need to cube the sq rt of -64?
that would make my answer -4?
is this correct?

 

[Denis]

the 3 is not a whole number on the outside of the sq rt...so does this mean that I need to cube the sq rt of -64?
that would make my answer -4?
is this correct?

YES, the CUBE ROOT of -64 = -4 : -4 * -4 = 16 * -4 = -64
...in spite of your 1st sentence which makes no sense