Question

Demonstrați identitatea:
a) a² +3a + 2 = (a +1)(a + 2);
b) x - x - 6=(x - 3)(x + 2);
+
c) c - 7c+10=(c-2)(c - 5);​

Answer 1

Răspuns:

a)a^2+a+2a+2=a(a+1)+2(a+1)=(a+1)(a+2)