Question

aratati ca expresia (xpatrat +2x+2)(xpatrat +2x+4) este patrat peefect,oricare ar fi nr real x​

Answer 1

$E = (x^2+2x+2)(x^2 +2x+4)\\ \\ x = 1 \Rightarrow E = (1+2+2)(1+2+4) = 5\cdot 7 = 35\\ \\ \Rightarrow E\text{ nu e patrat perfect.}$