Question

How do you factor completely `9x^4 - 12x^2 +4 = 0`?

Answer 1

`:. x=+-sqrt(2/3)`.

Explanation:

I hope the Problem is to solve the eqn. `9x^4-12x^2+4=0`.

`9x^4-12x^2+4=0`.

`:. (3x^2)^2-2(3x^2)(2)+(2)^2=0`.

`:. (3x^2-2)^2=0`.

`:. 3x^2=2, or, x^2=2/3`.

`:. x=+-sqrt(2/3)`.