Answer:
last graph
Step-by-step explanation:
D the mathematical work shown sbove is correct as written
Let the second no. be x
-3x = 21 → x = 21/-3 → x = -7
No, it is an imaginary number.
Can't take the square root of a negative number without creating a method termed an imaginary number, which is the square root of -1 which they have used " i " to signify.
Then square root of -11.2 would be written Sqrt(11.2)i. The Sqrt(11.2) = 3.3466
so the answer is 3.3466i
Assuming that the numbers haven't been rounded off, then yes, they are the same.