Question

Factorise.
81x⁴-16y⁴
class 8th:)​

Answer 1

Answer:

${9}^{2} ({x ^{2} })^{2} - {4}^{2} ({y ^{2}) }^{2} \\ ( {9 {x}^{2} )}^{2} - ({4 {y}^{2} )}^{2} \\ (9 {x}^{2} + 4 {y}^{2} )(9 {x}^{2} - 4 {y}^{2} )$