X=|x(4)-x(2)|
x(4)=-12+6*4-2*4^2=-20
x(2)=-12+6*2-2*2^2=-8
X=|-20-(-8)|=12м
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X=|x(4)-x(2)|
x(4)=-12+6*4-2*4^2=-20
x(2)=-12+6*2-2*2^2=-8
X=|-20-(-8)|=12м