Question

plzz help me to solve thi sum​

Answer 1

Answer:

a^4-25 ............is the correct answer.

[(a+b)(a-b)=a^2-b^2] identity is used here.

Explanation:

=(a^2+5)(a^2-5)

=a^4-5a^2+5a^2-25

=a^4-25.

Answer 2

Answer:

happy new year in advance