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[ x8 - 5x2 ] is not the difference of two squares. [ 5x2 ] is not really a square.

If you do have the difference of two squares, then:

-- Take the square roots of the two terms.

-- The factored form is (sum of the square roots) times (difference of the square roots)

Example:

Let's use . . . [ x8 - 9x2 ] .

The square roots of the terms are . . . [ x4 ] and [ 3x ] .

The factored form is (x4 + 3x) (x4- 3x).

Go ahead and FOIL those factors out and you'll see.

With this particular example, you could also continue, and

factor 'x' out of each of these factors, to wind up with

x2 (x3 + 3) (x3 - 3)

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More answers

5 is not a square number. That factors to x^2(x^6 - 5)

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9y ago
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Q: How do you factor the difference of two squares x8-5x2?
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