Answer:
-13t-1
Step-by-step explanation:
Given two equations
t2 - 8t - 7 ----------------- (1)
t2 + 5t - 6 ----------------- (2)
Now subtracting (2) from (1), we get
( t2 - 8t - 7 ) - ( t2 + 5t - 6 )
t2 - 8t - 7 - t2 - 5t + 6
-13t-1
Therefore, answer is -13t-1