Respuesta :
Expanding brackets
(3-c²d) (4-4c²d)
3 times 4 = 12
3 times - 4c²d = -12c²d
c²d times 4 = 4c²d
c²d times - 4c²d = -4c⁴d²
SO THEREFORE
12 - 12c²d - 4c²d + 4c⁴d²
= 12 - 16c²d + 4c⁴d²
(3-c²d) (4-4c²d)
3 times 4 = 12
3 times - 4c²d = -12c²d
c²d times 4 = 4c²d
c²d times - 4c²d = -4c⁴d²
SO THEREFORE
12 - 12c²d - 4c²d + 4c⁴d²
= 12 - 16c²d + 4c⁴d²