Hi can someone help me with this math problem i have to explain how to do the problem and how i got the answer step by step 5^4-25

Write a story that matches with the expression 42x-5 pls hurry

How to do this , and can some one explain

Which best describes the construction of a triangle if given the segment lengths of 2 cm, 3 cm, and 5 cm? a) unique triangle b) cannot be determined c) triangle not possible d) more than one triangle