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Not entirely sure, but looks like C. makes most sense.

Explanation:

When you inverse a function, you are doing the opposite of that function.

For example: If it was (x,y) then it would switch over and be (y,x).

Here, the ordered pairs follow a pattern. If we switch it over, it will be the opposite, as instead of X being the product of the pattern, it will be the cause. (If that made sense :) )

Hope this helps.

step-by-step explanation:

225x²+4=0

225x²=0-4

225x²=-4

x²=-4/225

x=±√-4/225