1) (-0.15-0.75)(-0.15+0.75) =(-0.9)*0.6=-0.54
(-0.15-0.75)= - 0.9 -сумма
-0.15-(-0.75)=-0.15+0.75 = 0.6- разность
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1) (-0.15-0.75)(-0.15+0.75) =(-0.9)*0.6=-0.54
(-0.15-0.75)= - 0.9 -сумма
-0.15-(-0.75)=-0.15+0.75 = 0.6- разность