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Write the Word or Phrase That Best Completes Each Statement (A+B)2=A2+B2(A+B)^{2}=A^{2}+B^{2}

Question 146

Essay

Write the word or phrase that best completes each statement or answers the question.
-When is the square of the sum the sum of a square; i.e., when is (A+B)2=A2+B2(A+B)^{2}=A^{2}+B^{2} ?

Correct Answer:

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Now (A + B)2 = A2 + 2AB + B2, so ...

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