4. Решите уравнение.
а) |x| = 9;
б) |x| = -5.
EfremovMk
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03.03.2021 20:45
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2
а) |х| = 9
х=9 или х=-9
ответ: -9; 9.
б) |х|=-5
корней нет, так как значение модуля не может быть отрицательным числом.
ответ: корней нет.
a)x=9
x=-9
x1=-9, x2=9
б)x∈∅
Пошаговое объяснение: