Question

Deci..la formule de calcul prescurtat

$(2x+3)^{2}= 2x^{2}+6x+9 SAU 4x^{2}+6x+9??$

Answer 1

[tex](2x+3)^{2}= (2x)^{2}+2*2x*3+3^{2} = 4x^{2}+12x+ 9 (a+b)^{2}= a^{2}+2*a*b+ b^{2}[/tex]

Sper ca te am ajutat!