Answer:
1. a²-b²
2.4b² + 5ab/2
Step-by-step explanation:
1:. it's a formula of a²-b² so, it can be solved like this and
2: I'm not sure about 2nd one
Answer:
positive
Step-by-step explanation
the line goes up and to the right
Answer:
2/5 0
Step-by-step explanation:
Answer:
f(7)=140
Step-by-step explanation:
Answer:
None of the above
Step-by-step explanation: