Question

Factorize:
81x^4 + 36x^2y^2 + 16y^4

Answer 1

AtlasOfAtlantis this is not answer

Answer 2

(9x^2+4y^2)^2-36*x^2*y^2

Answer 3

$$((9x^2)^2+9x^24y^2+(4y^2)=\frac{(9x^2)^3-(4y^2)^3}{9x^2-4y^2}$$