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30 March, 10:34

For all real numbers a and b, 2a • b = a2 + b2

True Or False! Explain

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Answers (2)
  1. 30 March, 10:55
    0
    This is true only if one of a or b is negative

    (a-b) ^2 is 0

    a^2+b^2-2ab=0

    a^2+b^2=2ab

    (A-b) ^2 is 0

    if a-b=0
  2. 30 March, 11:00
    0
    This may be equal with this formula of

    (a-b) ^2 = a^2 - 2ab + b^2
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