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Sagot :
Step-by-step explanation:
-√81=-√(9)²=-9
A number inside a Square root cannot ne negative. So, the second one is not a real no.
Answer:
[tex] - \sqrt{81} = - 9 \\ \sqrt{ - 25 = - 5} [/tex]
Step-by-step explanation:
-81/9 9+9+9+9+9+9+9+9+9(81)
-9
-25/5 (5+5+5+5+5(25)
-5
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