Question

E(x)=2(x+3)²-(2+x)(x-2)-2(5x+7)-7​

Answer 1

Răspuns:

Explicație pas cu pas:

E(x) = 2(x^2 + 6x + 9) - (x^2 - 4) - 10x - 14 - 7

= 2x^2 + 12x + 18 - x^2 + 4 - 10x - 21

= x^2 + 2x + 1

= (x + 1)^2

Answer 2

E(x)=2(x+3)²-(2+x)(x-2)-2(5x+7)-7

E(x)=2(x²+6x+9)-(x+2)(x-2)-10x-14-7

E(x)=2x²+12x+18-(x²-4)-10x-21

E(x)=2x²+12x+18-x²+4-10x-21

E(x)=x²+2x+1

E(x)=(x+1)²