2009 · Q58
If x = (a + √(a² + b²))^(1/3) + (a − √(a² + b²))^(1/3), then what is the value of x³ + 3bx − 2a?
Elementary MathematicsAlgebra
- A2a 3
- B–2a 3
- C1
- D0
Explanation
x³ + 3bx − 2a = 0.
If x = (a + √(a² + b²))^(1/3) + (a − √(a² + b²))^(1/3), then what is the value of x³ + 3bx − 2a?
Explanation
x³ + 3bx − 2a = 0.