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Eva8 [605]
3 years ago
8

When you add 2 positive intergers, the answer is always positive. When you subtract 2 positive intergers, is their difference al

ways a positive interger? Explain.
Mathematics
1 answer:
ololo11 [35]3 years ago
5 0

Answer:

No. If the second positive integer is larger than the first positive integer in a subtraction problem, the difference will be negative.

Step-by-step explanation:

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Solve the equation by factoring X^2+3x+2=0.
vredina [299]

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Step-by-step explanation:

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3 years ago
Let d = 3.
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3 years ago
Read 2 more answers
Which expression is equivalent to (sin x + 1)(sin x − 1)? A. cos2x B. -cos2x C. cos2x + 1 D. cos2x − 1 E. -cos2x + 1
Semenov [28]

ANSWER

B.

- \cos^{2} x

EXPLANATION

The given expression is

(sin x + 1)(sin x − 1)

Note that:

(x + 1)(x - 1) =  {x}^{2}  - 1

This implies that,

( \sin \: x + 1)( \sin \: x - 1)  =   \sin^{2} x - 1

We can factor -1 on the right hand side to get,

( \sin \: x + 1)( \sin \: x - 1)  =    - (1 - \sin^{2} x )

Note that from the Pythagorean Identity

1 - \sin^{2} x = \cos^{2} x

We apply this identity to obtain:

( \sin \: x + 1)( \sin \: x - 1)  = - \cos^{2} x

The correct choice is B

4 0
3 years ago
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