Find A square + B square, if a-b =23and ab = 11
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a sq. + b sq. = 551
(a-b)^2 = (23)^2
a^2 + b^2 - 2ab = 529
a^2 + b^2 - 2 × 11 = 529
a^2 + b^2 -22 = 529
a^2 + b^2 = 529 + 22
Therefore, a^2 + b^2= 551
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