Question

factorizar (x+y)3(3x-2y)4+2(x+y)4(3x-2y)3

Answer 1

(x+y)x3(3x-2y)x4+2(x+y)x4(3x-2y)x3
(1+2)x(x+y)x3(3x-2y)x4
3(x+y)x3(3x-2y)x4
36(x+y)x(3x-2y)
(36x+36y)x(3x-2y)
108x2-72xy+108xy-72y2 (los dos que estan al lado de la x es al cuadrado)
= 108x2+36xy-72y2