Решение и ответ:
21) |x+4| = 6
1) x + 4 = 6
x = 6 - 4
x = 2
2) x + 4 = -6
x = - 6 - 4
x = -10
22) 4510² - 4499² = 99099
4510² - 4499² = (4510 - 4499)(4540 + 4499) = 11 · 9009 = 99099
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Answers & Comments
Решение и ответ:
21) |x+4| = 6
1) x + 4 = 6
x = 6 - 4
x = 2
2) x + 4 = -6
x = - 6 - 4
x = -10
22) 4510² - 4499² = 99099
4510² - 4499² = (4510 - 4499)(4540 + 4499) = 11 · 9009 = 99099