In order to solve this, you need to put 3 different values into the equation: 1, 2, and 3. Let’s start with the first one.
1^2 - 2(1) - 3
Since one to any power is just 1, we can get rid of that squared sign.
1 - 2(1) -3
Multiply the 2 and 1
1 - 2 - 3
And finally combine all the terms together.
-4
Which gives us T(1) = -4
We can do the same thing for the other input values.
2^2 - 2(2) - 3
In this case, the 2 squared comes out to 2x2, or 4
4 - 2(2) - 3
And from there we can just combine the terms together using the same tactics as above
4 - 4 - 3
-3
To give us T(2) = -3
Finally, we can input 3 into the equation.
3^2 - 2(3) - 3
Here we do the 3x3 for the 3 squared
9 - 2(3) - 3
And then solve like above
9 - 6 - 3
0
Which gives us T(3) = 0
In short,
T(1) = -4
T(2) = -3
T(3) = 0
Hope this helps!
