Solution: What is the equivalent expansion of the cube of a binomial: (a-b)^3

(Last Updated On: January 23, 2020)

What is the equivalent expansion of the cube of a binomial: (a – b)^3

Problem Statement: ECE Board November 1990

What is the equivalent expansion of the cube of a binomial: (a-b)^3

  • A. a3 – 3a2b + 3ab2 + b3
  • B. a3 – 3a2b – 3ab2 – b3
  • C. a3 + 3a2b + 3ab2 – b3
  • D. a3 – 3a2b + 3ab2 – b3

Problem Answer:

(a – b)^3 is equal to a^3 – 3a^2b + 3ab^2 – b^3.

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Solution: What is the equivalent expansion of the cube of a binomial: (a-b)^3

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