Question

Factorise

a4 - 16b4
​

Answer 1

$= > a {}^{4} - 16b {}^{4} \\ = > a {}^{4} - (2b) {}^{4} \\ = > (a {}^{2} - 4b {}^{2} )(a {}^{2} + 4b {}^{2} )$

Answer 2

Hey mate....

a^4 - 16 b^4

( a ² ) ² - ( 4b²) ²

( a² + 4b ² ) ( a² - 4b ² )

( a² - 4b ² ) [ ( a² )- ( 2b ) ² ]

( a² + 4b²) ( a + 2b ) ( a - 2b )

HOPE IT HELPS YOU....

^-^