Question

Fie expresia E(x) =(x+3)*2 + (4x-1)(4x+1)-(4x-1)*2
x E R
a)Aduceti expresia la o forma mai scurta
b)Calculati E(-1)
* semnifica puterea :))

Answer 1

a) E(x)=x²+6x+9+16x²-1-16x²+8x-1

E(x)=x²+14x+7

b) E(-1)=(-1)²+14(-1)+7=1-14+7=-6