(Complex Numbers) write the given expression in terms of i. 4 square root -28 + 3?

Answer 1

4 x sqrt(-28 + 3)
= 4 x sqrt(-25)
= 4 x sqrt(25) x sqrt(-1)
= 4 x 5 x i
= 20i

Answer 2

Do you mean [4*sqrt(-28)] +3 ?

If so,

[4*sqrt(-28)] +3 = [4 * sqrt(28) * i ] + 3

= [4 * 2 * sqrt (7) * i] + 3

= 8sqrt7* i + 3 which is a complex number in simplest form

Answer 3

when dealing with complex numbers, i⁲=-1
or i=√(-1)
so anytime you see a negative number
under the √ sign,you can replace it with
√( neg number)=i⋅√(number)

so 4√(-28) + 3 could be thought of as
4i√(28)+ 3
since √(-28) = √(-1)⋅√(28)