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Shtirlitz [24]
3 years ago
9

Which of the following correctly describes the sum of two rational numbers?

Mathematics
1 answer:
Elena-2011 [213]3 years ago
8 0

Answer:

"The sum of two rational numbers is rational."  

By definition, a rational number can be expressed as a fraction with integer values in the numerator and denominator (denominator not zero). So, adding two rationals is the same as adding two such fractions, which will result in another fraction of this same form since integers are closed under addition and multiplication. Thus, adding two rational numbers produces another rational number.

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Step-by-step explanation:

Given

3 ( x + 4) + 2 ( 5 - x)

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7 0
2 years ago
49x2 - 81 is an example of the difference of two
Shkiper50 [21]

Answer:

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Step-by-step explanation:

Formulas are used to factorize the polynomials.

In the given question, we can see a difference of squares

the difference of squares can be factorized using the formula

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

Here a^2 and b^2 are squares and factorized as sum and difference of numbers.

So in the given options,

(4x + 3)(4x - 3) represents the factorization of a polynomial that was the difference of two squares as it is written as product of sum and difference of two numbers.

7 0
2 years ago
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