What subsitution should be used to rewrite x^8-3x^4+2=0 as a quadratic equation

Replace x^2 with m

Step-by-step explanation:

x^8-3x^4+2=0

We want to write this as a quadratic, which means as am^2+bm +c

x^8  needs to become m^2

Let m = x^4

Then m^2 = x^4^2 = x^8

Our equation becomes

m^2 -3m +2 =0

Replace x^2 with m

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step-by-step explanation:

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