use (a+b)^2=a^2+b^2+2ab to evaluate
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Answer:
5.63×5.63+11.26×2.37+2.37×2.37
= (5.63)^2 + 2×5.63×2.37+(2.37)^2
= (5.63+2.37)^2
= 8^2
= 64
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