Which expression is equal to 2 sqrt -28 4 sqrt7i -4 sqrt7 -4i sqrt7 4i sqrt 7

Which expression is equal to

Solution

Step 1:

We have to rewrite =

Step 2:

Now plug in the above value in the step 1, we get

We can write

Step 3:

Now, we plug in in the above expression , we get

Step 4:

Simplifying, we get

Therefore, the answer is d) 4i sqrt 7

answer: a

step-by-step explanation: