SOLUTION: (7) Solve 125x^3 -64=0 (A) -4/5, -2+2 sqrt 3i/5 (B) 4/5, -2+2 sqrt 3i?5 (C) -4/5, 4/5 (D) 4/5 Please be specific as to which letter answer is correct. Thanks!

Algebra ->  College  -> Linear Algebra -> SOLUTION: (7) Solve 125x^3 -64=0 (A) -4/5, -2+2 sqrt 3i/5 (B) 4/5, -2+2 sqrt 3i?5 (C) -4/5, 4/5 (D) 4/5 Please be specific as to which letter answer is correct. Thanks!      Log On


   

Question 30456: (7) Solve 125x^3 -64=0
(A) -4/5, -2+2 sqrt 3i/5
(B) 4/5, -2+2 sqrt 3i?5
(C) -4/5, 4/5
(D) 4/5
Please be specific as to which letter answer is correct.
Thanks!
Answer by mukhopadhyay(490) About Me  (Show Source):
You can put this solution on YOUR website!
125x^3 -64=0
=> x^3 = 64/125
=> x^3 = (4/5)^3
=> x = 4/5
Correct answer is D