Question

E(x)=x(3-2x)+(x-1)²-(4+x)(4-x),unde X apartine R
A)aduceti E(x)la forma cea mai simple
B)calculati E(3)=
C)calculati E(4)=

Answer 1

a)E(x)=3x-2x²+x²-2x+1-4²+x²
E(x)=x-15
b)E(3)=3-15=-12
c)E(4)=4-15=-11