Answer:



Step-by-step explanation:
Given

Required
Select 3 equivalent expressions

Express 9 as 3^2
--- This is one equivalent expression
Take
as difference of two squares
-- This is another equivalent expression:
Solving further:
becomes
-- This is another equivalent expression:
Hence, the equivalent expressions are:





Let
be the unknown number.
As per the question, we have

➺
➺
➺
➺
➺
Therefore,
should be subtracted from the product of
and
to get
.


➼
➼
➼
➼
➼


Answer: Try A, it's in a straight line
I'm truely sorry if i am wrong
Step-by-step explanation: