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Dennis_Churaev [7]
3 years ago
12

EMERGENCY! DUE VERY SOON! HELP!

Mathematics
1 answer:
kakasveta [241]3 years ago
8 0

Answer:

458

Step-by-step explanation:

21*21.8 = 457.8

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Step-by-step explanation:

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1 1/21

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Step-by-step explanation:

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3 years ago
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Factor the expression x4 − y4 using the polynomial identity (x2 − y2) = (x − y)(x + y). Hint: x4 = (x2)2 and y4 = (y2)2.
Tanya [424]

Answer:

(x - y)(x + y)(x² + y²)

Step-by-step explanation:

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= (x - y)(x + y)(x² + y²)

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