Multiply square root of -9* square root of -81

Math
-9⋅-81
Rewrite -9 as -1(9).
-1(9)⋅-81
Rewrite -1(9) as -1⋅9.
-1⋅9⋅-81
Rewrite -1 as i.
i⋅9⋅-81
Rewrite -81 as -1(81).
i⋅9⋅-1(81)
Rewrite -1(81) as -1⋅81.
i⋅9⋅(-1⋅81)
Rewrite -1 as i.
i⋅9⋅(i⋅81)
Rewrite 9 as 32.
i⋅32⋅(i⋅81)
Pull terms out from under the radical, assuming positive real numbers.
i⋅3⋅(i⋅81)
Move 3 to the left of i.
3⋅i⋅(i⋅81)
Rewrite 81 as 92.
3i⋅(i⋅92)
Pull terms out from under the radical, assuming positive real numbers.
3i⋅(i⋅9)
Move 9 to the left of i.
3i⋅(9⋅i)
Multiply 3i(9i).
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Multiply 9 by 3.
27ii
Raise i to the power of 1.
27(i1i)
Raise i to the power of 1.
27(i1i1)
Use the power rule aman=am+n to combine exponents.
27i1+1
Add 1 and 1.
27i2
27i2
Rewrite i2 as -1.
27⋅-1
Multiply 27 by -1.
-27
Multiply square root of -9* square root of -81

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