Definitely not D, because one of the x's needs to be negative, and the other should be positive so the x will end up negative when it is multiplied.
I want to say the answer is C. (-x-2i) (x-2i)
Hope this helps :)
Answer: -600 and 1600 were invested into the two accounts.
Step-by-step explanation:
x = amount invested in the first account.
y = amount invested in the second account.
You start off with this equation


Subtract both sides by y.

Subsitude 1000 - x for x for the second equation.

Use the distributive property to solve for y.




Subsitude -600 for y in the first equation and solve for x.


-600 and 1600 were invested into the two accounts.
Answer:
Answer
Profit = SP - CP
Profit = 1200 - 800
Profit = 400
Henceforth,
Profit made on the article is ₹400
Commutative property of addition