Multiple choice general knowledge math & puzzles

(A-B)^2

  1. A^2 + B^2 + 2xAxB

  2. A^2 + B^2 - 2xAxB

  3. A^2 - B^2

  4. (A-B)X(A+B)
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The algebraic identity (A - B)² expands to A² - 2AB + B², which can be written as A² + B² - 2AB. This is derived by multiplying (A - B)(A - B) using the distributive property. Option A incorrectly shows +2AB instead of -2AB.

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