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anonymous
 one year ago
Solve x3 = 64 over 27.
±8 over 3
8 over 3
±4 over 3
4 over 3
anonymous
 one year ago
Solve x3 = 64 over 27. ±8 over 3 8 over 3 ±4 over 3 4 over 3

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phi
 one year ago
Best ResponseYou've already chosen the best response.0you could check your answer choices

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0this isnt the one that needs checking

phi
 one year ago
Best ResponseYou've already chosen the best response.0x^3 means x*x*x so you could check if the answer times itself 3 times gives 64/27

phi
 one year ago
Best ResponseYou've already chosen the best response.0I am suggesting a way to decide what the answer is. one way is to check each of the 4 possible answers. only one of them should "work"

phi
 one year ago
Best ResponseYou've already chosen the best response.0the other way to answer the question is to "solve for x" but that involves finding cube roots.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let me look rlly fast

phi
 one year ago
Best ResponseYou've already chosen the best response.0let's test x= 8/3 what is \[ \frac{8}{3} \cdot \frac{8}{3} \cdot \frac{8}{3} \] multiply top times top and bottom times bottom

phi
 one year ago
Best ResponseYou've already chosen the best response.0yes and 512/27 is not 64/27 in other words, 8/3 (and also 8/3) is not the answer the other two choices are 4/3 and \(\pm\) 4/3 the only difference is the second choice includes 4/3 but 4/3 * 4/3 * 4/3= 64/27 it is negative and we want +64/27 that means the only answer that works is 4/3
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