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Find All Valid Real Roots for the Equation x6+4x345=0x ^ { 6 } + 4 x ^ { 3 } - 45 = 0

Question 70

Multiple Choice

Find all valid real roots for the equation.
- x6+4x345=0x ^ { 6 } + 4 x ^ { 3 } - 45 = 0


A) x=53,x=93x = - \sqrt [ 3 ] { 5 } , x = - \sqrt [ 3 ] { 9 }
B) x=53,x=93x = \sqrt [ 3 ] { 5 } , x = \sqrt [ 3 ] { 9 }
C) x=53,x=93x = \sqrt [ 3 ] { 5 } , x = - \sqrt [ 3 ] { 9 }
D) x=53,x=93x = - \sqrt [ 3 ] { 5 } , x = \sqrt [ 3 ] { 9 }

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