Question

What is the sum of the numbers

Answer 1

Answer:

B.) $4\sqrt{2}i$

Step-by-step explanation:

Simplify both radicals from negative form (the square root of -1 is i ):

$\sqrt{-1*2} +\sqrt{-1*18} \\\\\sqrt{2}i+\sqrt{18}i$

Simplify $\sqrt{18}$ :

$\sqrt{9*2}\\\\\sqrt{9}*\sqrt{2}\\\\ 3\sqrt{2}i$

Add:

$1\sqrt{2}i+3\sqrt{2}i\\\\4\sqrt{2}i$

:Done

Answer 2

Answer:

B  4i sqrt(2)

Step-by-step explanation:

sqrt(-2) = sqrt(-1) * sqrt(2) = i sqrt(2)

sqrt(-18) = sqrt(-1) sqrt(2) sqrt(9) = 3i sqrt(2)

Add them together

i sqrt(2) + 3i sqrt(2)

4i sqrt(2)