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fredd [130]
3 years ago
6

Factor the expression x4 − y4 using the polynomial identity (x2 − y2) = (x − y)(x + y). Hint: x4 = (x2)2 and y4 = (y2)2.

Mathematics
1 answer:
Tanya [424]3 years ago
5 0

Answer:

(x - y)(x + y)(x² + y²)

Step-by-step explanation:

x^{4} - y^{4} ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b), thus

x^{4} - y^{4}

= (x²)² - (y²)²

= (x² - y²)(x² + y²) ← x² - y² is also a difference of squares, then

= (x - y)(x + y)(x² + y²)

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