2 Упростите выражение:
1) -1,2а ∙ (-6b); 3) b+(7 –b) – (14 – b);
2) –4m –13n+3m+14n; 4) –2(x –3)+4(x+1).
1) -1,2а ∙ (-6b); 3) b+(7 –b) – (14 – b);
2) –4m –13n+3m+14n; 4) –2(x –3)+4(x+1).
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Ответ:
Пошаговое объяснение:
1)-1.2а*(-6b)=7.2ab 2)-4m-13n+3m+14n= -m+n 3)b+(7-b)-(14-b)= -7+b 4)-2(x--3)+4(x+1)=2x+10