Answer:
10
---------
9 t^2
Step-by-step explanation:
10t 20t-40
----------- * ------------
6t-12 30 t^3
Factor
10t 20(t-2)
----------- * ------------
6(t-2) 30 t^3
We can cancel 10t
1 20(t-2)
----------- * ------------
6(t-2) 3 t^2
We can cancel t-2
1 20
----------- * ------------
6 3 t^2
We can cancel a 2 from the 20 and from the 6
1 10
----------- * ------------
3 3 t^2
10
-----------
9 t^2