Mathematics: Find the positive solution and explain how ; 4;

Find the positive solution and explain how ; 4; - id42969362, carethegymnast8954

Ответ:

jj1077348

05.01.2022

(x + 2)² - 10 = 0 (assuming it's equal to zero)

Expand the binomial: (x + y)² = x² + 2xy + y²
Thus, x² + 4x + 4 - 10 = 0
x² + 4x - 6 = 0

$x = \frac{-4 +_- \sqrt{16 + 24}}{2}$ (by quadratic formula)
$= \frac{-4 +_- \sqrt{40}}{2}$
$= \frac{-4 +_- 2\sqrt{10}}{2}$
$= -2 + \sqrt{10}$ , since we're taking the positive solution.

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Ответ:

janahiac09

09.09.2021

Mathematics

The larger boulder which is located 1,044 kilometers away for a herd of elephant when the boulder is crashed to the herd of elephants where the temperature is 29 degree, it would create a sound traveling 343. m/s. So the closest answer from your choices is letter D. 348 m/s

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Find the positive solution and explain how ; 4;

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