Question

Factorize:
a4-81b4
Please explain me
Please​

Answer 1

Answer:

(a-3b)(a+3b)(a^2+9b^2)

Step-by-step explanation:

a^4-81b^4

(a^2)^2-(9b^2)^2

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

(a^2-9b^2)(a^2+9b^2)

a^2-(3b)^2 (a^2+9b^2)

=(a-3b) (a+3b) (a^2+9b^2)

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