Question

(2,4-a)(a+2,4)+(1,9+a)(a-1,9)

Answer 1

(2,4-a)(a+2,4)+(1,9+a)(a-1,9)=2,4a+5,76-a^2-2,4a+1,9a-3,61+a^2-1,9a=5,76-3,61=2,15

Answer 2

It seems like you are providing two sets of expressions enclosed in parentheses, and it's not clear what operation you want to perform with them. Please clarify the operation you want to use (e.g., addition, multiplication, etc.) and the format of the result you're looking for.

For example, if you want to perform addition with the given expressions, it would look like this:

(2,4-a) + (a+2,4) + (1,9+a) + (a-1,9)

If you meant something else or have specific instructions in mind, please let me know so I can assist you better.