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What is the value of 81−−√81?

 Mar 31, 2022
 #1
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+1

81 - - sqrt81 = 81 + 9 = 90

 Mar 31, 2022
 #2
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81 - 9 = 72 72 is the answer

 Mar 31, 2022
 #3
avatar+37152 
+1

Nope ....  two minus signs make a ' + '   sign     81 - -9    = 81 + 9 = 90

ElectricPavlov  Mar 31, 2022

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