Question

Descompuneti in products de factori:
a) (x-2)^2-(2x+1)^2
b) x^2+ 10x+25
c) x^2+8x+12​

Answer 1

Răspuns:

a)

(x - 2)^2 - (2x + 1)^2 ==

(x - 2 - 2x - 1)(x - 2 + 2x + 1) =

(- 3x - 3)(3x - 1)

b)

x^2 + 10x + 25 =

x^2 + 5x + 5x + 25 =

x (x + 5) + 5 (x + 5) =

(x + 5)(x + 5)  

c)

x^2 + 8x + 12 =

x^2 + 2x + 6x + 12 =

x (x + 2) + 6 (x + 2) =

(x + 2)(x + 6)

#copaceibrainly ​