Question

simplifica raportul pina la un raport ireductibil
3x+9supra xpatrat+6x+9
apatrat-2ab+bpatrat supra apatrat-bpatrat

Answer 1

[tex]\dfrac{3x+9}{x^2+6x+9}=\dfrac{3(x+3)}{(x+3)^2}=\dfrac{3}{x+3}\\ \dfrac{a^2-2ab+b^2}{a^2-b^2}=\dfrac{(a-b)^2}{(a-b)(a+b)}=\dfrac{a-b}{a+b}\\ \text{Identitati folosite:}\\ \bullet a^2-b^2=(a-b)(a+b)\\ \bullet a^2\pm 2ab+b^2=(a\pm b)^2[/tex]