Let h=the term 'half-life'.
(h1)+(h2)=?
First, solve for parentheses.
h+hh=?
Therefore, the answer is h3.
h+hh=h3
The answer is Half-Life 3.
hh is not the same as h2.
Use super script for 2 and it would be correct.
Also h+hh=h3 doesn't make sense.
If H=3,
3+3(3)=12
But h3=9, so it makes no sense.
However if you use exponents.
3
1+3
2==3
33+9==27?
Wrong.
Now, let's just think Life=1, so Half-Life=1/2.
1/2+1/2(2)=1+1/2 Life.
But if he did Episode one and two, then we would have to figure out what they would be classified as. Since there are 3 episodes of Half life 2, we can expect it would be 1/2*2/3=1/3.
1+3/6+4/6=2+1/6 Lifes.
The answer would be that he has finished 2 and one-sixth lifes.