Question

E(x)=(x-2)²-(x-1)²+(x-2)×(x+2)+3x

Answer 1

Răspuns:

E(x)= x²+x-1

Explicație pas cu pas:

E(x)=(x-2)²-(x-1)²+(x-2)×(x+2)+3x

(x-2)²=x²-4x+4

(x-1)²=x²-2x+1

(x-2)×(x+2) = x²-4

E(x)=(x²-4x+4)-(x²-2x+1)+(x²-4)+3x

E(x)=x²-4x+4-x²+2x-1+x²-4+3x

E(x)= x²+x-1

Answer 2

Buna,

Ai rezolvarea in poza