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Arithmetic Aptitude :: Simplification

9. if x^3 + 3x^2 + 3x = 7, then x is equal to

Answer: Option B

Explanation :

x^3 + 3x^2 + 3x = 7
Adding both side 1
=> x^3 + 3x^2 + 3x + 1= 7 +1
=> (x+1)^3=2^3
=> x+1 = 2 => x =1

Asked In :: Capgemini Global Edge

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