Question

Descompuneti:

a) xla a doua+3x+2
b)xla a doua+5x+6
c)xla a doua+7x+12

Answer 1

$a) {x}^{2} + 3x + 2$

$= {x}^{2} + 2x + x + 2$

$= x(x + 2) + 1(x + 2)$

$= (x + 1)(x + 2)$

$b) {x}^{2} + 5x + 6$

$= {x}^{2} + 2x + 3x + 6$

$= x(x + 2) + 3(x + 2)$

$= (x + 2)(x + 3)$

$c) {x}^{2} + 7x + 12$

$= {x}^{2} + 3x + 4x + 12$

$= x(x + 3) + 4(x + 3)$

$= (x + 3)(x + 4)$