Question

Calculați x la a doua plus 4x plus 4​

Answer 1

Salut,

x² + 4x + 4 =  x² + 2·x·2 + 2² = (x + 2)².

Am aplicat formula de calcul prescurtat:

$a^2+2\cdot a\cdot b+b^2=(a+b)^2.$

Green eyes.

Answer 2

"x la a doua plus 4x plus 4​"

x^2 + 4x + 4

$\it x^2 + 4x + 4 =x^2 + 4x + 2^2 =(x+2)^2$