-20–48

Rewrite -20 as -1(20).

-1(20)–48

Rewrite -1(20) as -1⋅20.

-1⋅20–48

Rewrite -1 as i.

i⋅20–48

Factor 4 out of 20.

i⋅4(5)–48

Rewrite 4 as 22.

i⋅22⋅5–48

i⋅22⋅5–48

Pull terms out from under the radical.

i⋅(25)–48

Move 2 to the left of i.

2⋅i5–48

Rewrite -48 as -1(48).

2i5–1(48)

Rewrite -1(48) as -1⋅48.

2i5-(-1⋅48)

Rewrite -1 as i.

2i5-(i⋅48)

Factor 16 out of 48.

2i5-(i⋅16(3))

Rewrite 16 as 42.

2i5-(i⋅42⋅3)

2i5-(i⋅42⋅3)

Pull terms out from under the radical.

2i5-(i⋅(43))

Move 4 to the left of i.

2i5-(4⋅i3)

Multiply 4 by -1.

2i5-4i3

Simplify square root of -20- square root of -48