Ответ:
Пошаговое объяснение:
№3.
-(4a+1,2b)+(0,7b-1,6a)-(1,1b-7,2a)=-4a-1,2b+0,7b-1,6a-1,1b+7,2a
=1,6a-1,6b=1,6*(a-b).
№4.
(1/2)*(2a-4)-(1/3)*(5b+9)=(1/2)*(2*2¹/₂-4)-(1/3)*(5*(2/15)+9)=
=(1/2)*(5-4)-(1/3)*(2/3+9)=(1/2)*1-(1/3)*9²/₃=1/2-(1/3)*(29/3)=
=(1/2)-(29/9)=(1*9-29*2)/18=(9-58)/18=-49/18=-2¹³/₁₈.
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Answers & Comments
Ответ:
Пошаговое объяснение:
№3.
-(4a+1,2b)+(0,7b-1,6a)-(1,1b-7,2a)=-4a-1,2b+0,7b-1,6a-1,1b+7,2a
=1,6a-1,6b=1,6*(a-b).
№4.
(1/2)*(2a-4)-(1/3)*(5b+9)=(1/2)*(2*2¹/₂-4)-(1/3)*(5*(2/15)+9)=
=(1/2)*(5-4)-(1/3)*(2/3+9)=(1/2)*1-(1/3)*9²/₃=1/2-(1/3)*(29/3)=
=(1/2)-(29/9)=(1*9-29*2)/18=(9-58)/18=-49/18=-2¹³/₁₈.