-16-3-25

Rewrite -16 as -1(16).

-1(16)-3-25

Rewrite -1(16) as -1⋅16.

-1⋅16-3-25

Rewrite -1 as i.

i⋅16-3-25

Rewrite 16 as 42.

i⋅42-3-25

Pull terms out from under the radical, assuming positive real numbers.

i⋅4-3-25

Move 4 to the left of i.

4⋅i-3-25

Rewrite -25 as -1(25).

4i-3-1(25)

Rewrite -1(25) as -1⋅25.

4i-3(-1⋅25)

Rewrite -1 as i.

4i-3(i⋅25)

Rewrite 25 as 52.

4i-3(i⋅52)

Pull terms out from under the radical, assuming positive real numbers.

4i-3(i⋅5)

Move 5 to the left of i.

4i-3(5⋅i)

Multiply 5 by -3.

4i-15i

4i-15i

Subtract 15i from 4i.

-11i

Simplify square root of -16-3 square root of -25