Question

9a^2-(a^2-4)^2


answer is. (a+4)(a-1)(4-9) (1+9)​

Answer 1

............so you want to explain

Answer 2

SOLUTION:-

9a^2 - (a^2-4)^2

=(3a^2)^2 - (a^2-4)^2

=[3a+(9^2-4)] [3a-(a^2-4)]

={3a+[(9a)^2-(2)^2][3a-(9)^2-(2)^2]}

=[3a+(a+2)(a-2)] [3a-(a+2)(a-2)]

=(a+4)(a-1)(4-9)(1+9)

HOPE THIS SOLUTION IS RIGHT..

IF RIGHT PLZ MARK MY ANSWER AS BRAINLIEST....!!