Respuesta :

15x^2y^2−3x^3y+75x^4

 factor 3x^2 out of everything:

15x^2y^2 would become 3x^2(5y^2)

-3x^3y becomes 3x^2(-1y)

75x^4 becomes 3x^2(25x^2)

 factor out 3x^2 from the 3 numbers above to get

 3x^2(5y^2-y+25x^2)