Question

x2 - 1 = x + 1

(1 point)
x = -1
x = -2
x = 2 and x = -1
x = -1 and x = -2

Answer 1

420 420

Answer 2

(:

Answer 3

x^2-1=x+1
x^2-1-x-1=0
x^2-x-2=0
(x-2)(x+1)=0
x=2 or x=-1

Answer 4

third one :)

Answer 5

thanks

Answer 6

welcomev :)