Question

Which of the following is equivalent to 18 minus StartRoot negative 25 EndRoot?

Answer 1

Answer: 12-i

12-(√-1)

Explanation:

`18-√(-25)` Original Question

`18-(√(25) * √(-1) )` Split

`18-5*(√(-1) )` Solve for square root

`12-√(-1)` Subtract

You can substitute
`√(-1)` for i

`12-i` Substitute

Answer 2

18-5i

Explanation: