Question

(a^2-5b) ^2-81 factories ​

Answer 1

Step-by-step explanation:

a*4+25b²-10a²b-81=0

OK friend this is urs answer

Answer 2

(a^2-5b^2)^2-81
= (a^2-5b^2)^2-(9)^2
= (a^2-5b^2-9)(a^2-5b^2+9)