Using (a+b)² = (a² + b² + 2ab), evalute (11.6)²
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identity - (a+b)² = (a²+b²+2ab)
= (11+0.6)²
= (11)² + (0.6)²+2×11×0.6
= (121) +(0.36) +13.2
= 134.56
134.56 ans.
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