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Calculați x la a doua plus 4x plus 4​

Răspuns :

Salut,

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

Am aplicat formula de calcul prescurtat:

[tex]a^2+2\cdot a\cdot b+b^2=(a+b)^2.[/tex]

Green eyes.

"x la a doua plus 4x plus 4​"

x^2 + 4x + 4

[tex]\it x^2 + 4x + 4 =x^2 + 4x + 2^2 =(x+2)^2[/tex]