how to solve this problem 3x^2+1=x^2-1 ,help me please .

Question

this is a problem of algebra II

Answer 1

3x^2 + 1 = x^2 - 1

subtract x^2 from both sides  2x^2 + 1 = -1

subtract 1 from both sides 2x^2 = -2

divide by 2 on both sides   x^2 = -1

take the square root    x = (-1)^1/2 this is an imaginery number or there is not real answer.