Question...

heya all .. again...
i was wondering if anyone out there knows the meaning of that symbol x inserted in a O, and if u can help me find the right asnwear on that one ?

The meaning of the is defined for you right there in the problem. It's basically a new abstract binary operator. You could also think of it as a function with two arguments: the number on its left, and the number on its right. Does that help?

Thanks very much for your help , i still dont fully get it though , , because after that i keep getting different answears from the one who is supposed to me the right one ( which is 100 ) , ill try harder , thanks again

Try going from the inside out. What is ?

i thought ( 4O3)2 = a and 2 = b , then 3ab-2b(sqrt)= b(3a-2b) = > 2(3x12-2x2)= 60 .... :(

No, I think you're off a bit. Let me re-define the problem a little. Suppose I define a function as follows:

.

What is ?

you are very good , thanks very much again , i was completely lost :) , have to do a test that includes few models - maths , history , etc and i just got totally mixed up with everything ... ,
is that the right thing to do
f(4,3)=36-18=18
f(18,2)=3x18x2-2x4=108-8=100 ?

You got it. Just change the notation to use the original symbol, and you're done.

thats great

You're welcome. Have a good one!