Question

Descompuneti in factori primi;
A)1/4x^2-1/49

B)x^3+x^2+2x+2

C)x^2+3x+2

Answer 1

A)
=(1/2x -1/7)(1/2x +1/7), s-a folosit a^2-b^2=(a-b)(a+b)
B)
=x^2(x+1)+2(x+1)=(x+1)(x^2+2)
C)
=x^2+x+2x+2=x(x+1)+2(x+1)=(x+1)(x+2)