Question

Descompuneti in factori :
a) ac-ad+bc-bd
b) x²+xy+x+y
c) a³+a²b+2ab²+2b³
d) a³-2a²-2a+4

Answer 1

a) c(a + b) - d(a + b) = (a + b)(c - d)
b) x(x + 1) + y(x + 1) = (x + 1)(x + y)
c) a²(a + b) + 2b²(a + b) = (a + b)(a² + 2b²)
d) a²(a - 2) - 2(a - 2) =  (a - 2)(a² - 2)