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Elina2331
@Elina2331
July 2022
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х³+4х²=9х+36
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Banabanana
Verified answer
х³ + 4х² = 9х + 36
х³ + 4х² - 9х - 36 = 0
х²(х+4) - 9(х+4) = 0
(х² - 9)(х + 4) = 0
(х - 3)(х + 3)(х + 4) = 0
х - 3 = 0 или х + 3 = 0 или х + 4 = 0
х = 3 х = -3 х=-4
Ответ: х=-4; х=-3; х=3
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Answers & Comments
Verified answer
х³ + 4х² = 9х + 36х³ + 4х² - 9х - 36 = 0
х²(х+4) - 9(х+4) = 0
(х² - 9)(х + 4) = 0
(х - 3)(х + 3)(х + 4) = 0
х - 3 = 0 или х + 3 = 0 или х + 4 = 0
х = 3 х = -3 х=-4
Ответ: х=-4; х=-3; х=3