Question

usund suitable identitiy find value of 11.7² _ 8.3²​

Answer 1

$= {11.7}^{2} - {8.3}^{2} \\ = (11.7 + 8.3)(11.7 - 8.3) \\ = (20)(3.4) \\ = 68$

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Answer 2

Answer:

11.7^2-8.3^2=(11.7+8.3)(11.7-8.3)=20×3.4=68

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