Hallar el valor numérico de:
(c a)(c b)
(x a)(x b)
(b c)(b a)
(x c)(x a)
(a b)(a c)
(x b)(x c)
 
 

 
 

 
 
Para: x = -2, a = 1, b = 3, c = -3. que algien me allude plis