Question

Dacă E(x) = $x^{2}$ - 5x + 6 , x ∈ Z , calculaţi E(-7) .

Mulţumesc !!

Answer 1

          
$E(x)= x^{2} -5x+6 \\ E(-7)= (-7)^{2}-5*(-7)+6=49+35+6=84+6=90$