please give me a answer
Attachments:

Answers
Answered by
0
Answer:
I don't know the answer of this question
Answered by
0
Step-by-step explanation:
hey mater here is your answer
we know a formula that :a^2-b^2=(a+b) (a-b)
1)=(x^2-y^2) (x^2+y^2)
=x^4-y^4
2)=(x+2) (x-2)
=x^2-4
3)=(2/b-5/c) (2/b+5/c)
=4/b^2-25/c^2
4)=(ab+9) (ab-9)
=a^2b^2-81
please mark as a brainliest
Similar questions