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a fost răspuns

Sa se rezolve ecuatiile si inecuatiile:
1) |2x|= -1
2) |2-x| < 4
3) |x-5| > 1
4) |x-1| + |2x-2|=0
5) |x²-4| + |2-x|=0

Răspuns :

Dedu123
1.|2x| = -2x
2.|2-x| < 4 = |2-x| = 1 < 4
3.|x-5| > 1 = x-5 = 0 => x=5-5 < 1
4.|x-1| + |2x-2| = 0 => |x-1| = x = 1 , = |2x-2| = 0 => 2x = 2
5.|x²-4| + |2-x| = 0 => |x²-4| => x² = 2-4 = -2+ |2-x| = |2-2| = 0 

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