Answer: option 2. x²-1
Step-by-step explanation:
concept to know: a²-b²=(a+b)(a-b)
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(a+b)(a-b)=a²+b²
(x+1)(x-1)=x²-1
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9514 1404 393
Answer:
rules of exponents apply
Step-by-step explanation:
The applicable rules of exponents are ...
a^-b = 1/a^b
(a^b)(a^c) = a^(b+c)
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Applying those rules to the given equation, you get ...

A. 5
20000- 18050 = 1950
1950/2 = 975
975/20000 = .48 (round to 5)
Subtract 11xy^2- from 9xy^22 to get -2xy^2