Question

Simplify.
✓-9
-9 + V-16
[?]i
Enter
Please help!!!

Answer 1

• 
  `\sf 7i`

Explanation:

`\sf √(-9) +√(-16)`

First, Simplify √(-9) to √(9i):

`\sf √(9i) +√(-16)`

Since 3 * 3= 9, square root of 9 is 3.

`\sf 3i+√(-16)`

Now, Simplify √(-16) to √(16i):

`\sf 3 +√(16i)`

Now, since 4*4 = 16, the square root of 16 is 4.

`\sf 3i+4i`

Simplify.

`\sf 7i`

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