Answer:
110
Explanation:
The expansion (a + b)³ is
(a + b)³ = a³ + b³ + 3ab(a + b)
Then
(x + )³ with a = x and b =
= x³ + + 3x . (x + )
Thus
x³ + = (x + )³ - 3(x + )
= 5³ - 3(5)
= 125 - 15
= 110
x=5/3 your answer right answer
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)³ with a = x and b = 
+ 3x . (x + ) = (x + )³ - 3(x + )