Is irrational number a number that cannot be worked out by square root Why give examples

Irrational number is a real number that can not be accurately expressed as the ratio of two integers, that is, infinite non cyclic decimal. For example, PI, the square root of 2, etc

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3. [simple calculation of score] (3 / 4 plus 5 / 8) times 32 (3 / 4 plus 5 / 8) times 32 = = = =
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