Simplifying Expressions. Easy 10 points.?

Question

Simplify each expression.

Square Root of -4 + Square Root of -16 + Square Root of -1

Answer 1

srqt of (-4) = 2 sqrt.(-1)

srqt of (-16) = 4 sqrt.(-1)

srqt of (-1) = sqrt.(-1)

by addition

                 7sqrt,(-1) but  sqrt,(-1 ) = i

therefore = 7i  

Answer 2

Square Root of -4 is equal to 2 times Square Root of -1

Square Root of -16 is equal to 4 times Square Root of -1

Now we can factorize the Square Root of -1 and in round brackets we may add (2 +4 + 1) = 7. Finally expression would be 7 times square root of -1. If we put under the square root 7, we would have square root of - 49.  

Answer 3

√-4 + √-16 + √-1

√ -1  = i

subsitute that

i√4+i√16+i√1

2i+4i+i  =    7i   = 7√-1

Answer 4

-2+(-4)+1=-5

-5 easy

Answer 5

Square Root of -4 + Square Root of -16 + Square Root of -1

= sqrt (4i^2) + sqrt (16i^2) + sqrt(i^2)  

       [ i = complex number = sqrt (-1), i^2 = -1]

= [(+) or (-)] * (2i + 4i + i)

=  [(+) or (-)] *7i

Answer 6

looks hard