Question

Multimea solutiilor ecuatiei (x+1)la a2-a -1=3

Answer 1

(x+1)²=3+1
(x+1)² =4
 x+1 = √4
x+1 = +/- 2
cazul 1) x+1 = 2
x = 1
cazul 2) x+1 = -2
x = -3

Answer 2

(x+1) la patrat -1=3
x patrat+ 1 patrat +2 * x * 1 -1=3
x patrat+1+2x-1=3
x patrat+1+2x=4
x patrat + 2x =3
3x patrat =3 /:3
x patrat=1
x= radical din 1
x=1
solutia={1, -3}