# Math Help - The use of an operator

1. ## The use of an operator

Hi

The operator will be called Op

If a Op b = 3 + ab for all real numbers a and b, then 2 Op (1 Op 3)

I dont even know where to start..

2. Originally Posted by Twig
The operator will be called Op
If a Op b = 3 + ab for all real numbers a and b, then 2 Op (1 Op 3)
I dont even know where to start..
You can't possibly mean that.

3. ## hi

Hi

does this mean I make a= 1 and b=3 ?

then I do the formula, 3 + 1*3 and that times two?

4. Originally Posted by Twig
then I do the formula, 3 + 1*3 and that times two?
No. Say that X=3 + 1*3
The 2 Op X =?

5. ## hi

Uh, so you mean taking 2 Operators times X?

I dont really get it

6. ## hi

Hi!

I solved it, thx for your help!

Now I get what they´re saying, at first I did NOT interpret the question right so to speak..

I took 2 Op (3 + 1*3), that gave me -> 3 + 2(3 + 3) = 15