Jakie liczby spełniają podany warunek.
a) | x + 4 | = 12
b) | x - 3 | = 6
c) | x - 5 | = 75
Bardzo prosze o dokładne obliczenia, a nie sam wynik. :)
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a) I x + 4 I = 12 <=> x + 4 = - 12 v x + 4 = 12 <=> x = - 16 v x = 8
Odp. - 16 i 8
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b) I x - 3 I = 6 <=> x - 3 = - 6 v x - 3 = 6 <=> x = -3 v x = 9
Odp. - 3 i 9
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c) I x - 5 I = 75 <=> x - 5 = - 75 v x - 5 = 75 <=> x = - 70 v x = 80
Odp. - 70 i 80
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