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Module-ka x0 waa 0. Module-ka nambarku waa fogaanta uu eber u jiro, maadaama 0 uu horay ugu sugnaa eber, masaafada uu eber u jiro waa 0.
Xagga xisaabta, moduleska x0 waxa loo qoraa |x0| = 0. Tani waa sababta oo ah shaqada qiimaha saxda ah, |x|, waxaa lagu qeexay sida soo socota:
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|x| = x hadday x>= 0
|x| = -x haddii x = 0, modules-ka x0 waa si fudud x0 laftiisa, kaas oo ah 0.