Question

9a^2-(a^2-4)^2factorise​

Answer 1

Answer: ( 3a - ( a - 2) ( a + 2 )) ( 3a + ( a - 2 ) ( a + 2 ))

Step-by-step explanation9a^2-(a^2-4)^2

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

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

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

=> ( 3a - ( a - 2) ( a + 2 )) ( 3a + ( a - 2 ) ( a + 2 ))

Answer 2

Answer:

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

Step-by-step explanation:

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

apply formula a^2-b^2....