Question

Rezolvati in R ecuatia
(x-2)(2x+1)-(2x-1)²= -2(x-1)(x+1)
 eu am facut asa:
(x-2)(2x+1)-(2x-1)²= -2x+2x+2
(x-2)(2x+1)-(2x-1)²= 2
mai departe m-am blocat... astept sa imi ziceti daca am facut bine! si sa-mi dati cateva indicii sa continui. multumesc!

Answer 1

(x-2)(2x+1)-(2x-1)la puterea 2 = -2(x-1)(x+1)
2x²+x-4x-1-4x²+4x-1= -2(x²-1)
-2x²+x-2= -2x²+2
-2x²+x-2+2x²-2=0
x-2=0
x=2
Sper ca am calculat bine.