Question

Demonstrati ca urmatoarele inegalitati sunt adevarate :
X^2 + 4xy + 4y^2 > -1
X^2+6x+y^2-2y > -11
^ = La puterea

Answer 1

[tex] 1) x^{2} +4xy+ 4y^{2} \ \textgreater \ -1 ; (x+2y)^{2} \ \textgreater \ -1 [/tex]