√-81 = ? (a) 1/9 (b) 9 (c) 1/3 (d) none.
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Answer:
9i
Step-by-step explanation:
To find the square root of 81 , or √81 , we have two find one number, that when multiplying itself, equals to 81 . That number is 9→ (9⋅9=81) Therefore √81=9
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