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Umnica [9.8K]
3 years ago
14

Fine the product mentally. [(x+1) (x-1)^2

Mathematics
2 answers:
Murljashka [212]3 years ago
5 0
If the product is: [(x+1) (x-1)]^2 , the answer is:
[(x+1) (x-1)]^2 = [x^2-1]^2 = x^4-2x^2+1
Helga [31]3 years ago
5 0

Answer:

x^4 - 2x^2 +1

Step-by-step explanation:

[(x+1) (x-1)]^2

We notice that this is the difference of squares

a^2 -b^2 = (a+b) (a-b)

Since we have (x+1) (x-1) , it simplifies to (x^2 -1)

[x^2-1]^2

We know  (a-b)^2  is a^2 -2ab +b^2

[x^2-1]^2 = x^4 - 2x^2 +1

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Answer:

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Step-by-step explanation:

\frac{4}{50} = \frac{x}{1400}  write the proportion where x is the number of people with a             missplaced time

50x = 5600  cross multipy

x = 112 divide both sides by 50

3 0
2 years ago
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zepelin [54]

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The null and alternative hypotheses are given. Determine whether the hypothesis test is​ left-tailed, right-tailed, or​ two-tail
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Step-by-step explanation:

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Here, the alternative hypothesis (H_1) is two-tailed, so the hypothesis test is a two-tailed test.

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