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Dmitry_Shevchenko [17]
3 years ago
8

The expression 25x2 - 81 can be rewritten as (5x - 9)(5x + 9). (5x - 9) is a ____ of 25x2 - 81.

Advanced Placement (AP)
2 answers:
Alisiya [41]3 years ago
8 0

Answer: factors.

Explanation: The expression: 25x^2 - 81 is a quadratic equation, so it has two x-axis intercepts.

Now, it can be written as  (5x - 9)(5x + 9) = 5(x - 9/5)(x + 9/5)

where -9/5 and 9/5 are the two x-axis intercepts of the quadratic equation.

Now, the equation (5x - 9)(5x + 9) is called a "factorization" of the equation  25x^2 - 81, and the segments  (5x - 9) and (5x + 9) are called "factors" of the equation 25x2 - 81.

Rama09 [41]3 years ago
5 0
It's a factor of 25x2-81
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By reducing the mangroves, the organic carbon in the soil also decreases

Mangroves are an ecosystem formed by species resistant to salt, called mangroves, located near the mouth of rivers and near the sea; a large amount of organic matter is produced in the process that increases the amount of carbon in the soil.

The best method to analyze the amount of carbon in the soil according to the distance from the mangrove to the interior humidities is by taking an average of each measurement

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Zone far from the coast (inland)

 Sample    Organic carbon production

     1            0.158

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In conclusion, the averages allow us to understand the influence of the mangrove on the fixation of organic carbon in the soil.

By reducing the mangroves, the organic carbon in the soil also decreases

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