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

1 Answer

Mar 2, 2018

#:. 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)#.

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