What is the sum of square root -2 and square root -18

4 square root of 2 i (i it's outside the square root)

explanation:

square root of -2 = square root of 2 i (i being outside)

and square root of -18 = square root of 1 and square root of 9*2, square root of 1 = i, and the square root of 9 is 3, leaving square 2 alone

so it would look like:

square root of 2 i PLUS 3 square root of 2 i (i being outside as well)

there is a 1 outside the square root of 2 i, that 1 adds up with the 3 and since the square roots are the same, they stay the same

so 4 square root of 2 i

c

c

c

c

c

c

c

cc

c

step-by-step explanation: