👤

Rezolvati in R ecuatia : ( x² + x + 1 )² - ( x² - x + 2 )² = 0

Răspuns :

[(x²+x+1)+(x²-x+2)][(x²+x+1)-(x²-x+2)]=(x²+x+1+x²-x+2)(x²+x+1-x²+x-2)=(2x²+3)(2x-1)=4x³-2x²+6x-3
Am aplicat: a²-b²=(a-b)(a+b)
Spor la lucru!
(x² +x +1)² -(x² -x +2)² =0
(x² +x +1)² = (x² -x +2)²
⇒ x² +x +1 = x² -x +2
x² -x² +x +x =1
2x =1
x =1/2