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Unicorn20062
@Unicorn20062
July 2022
2
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Раскройте скобки
А) 4(5m-3n)
Б) -7(6a-4b)
B) -0,4(3x+5y-6)
Г) -0,4(3k-2m+10)
Д) -11(5a-4b)
E) 9(3x-2y)
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1svetlanakiev
А) 20m-12n
Б)-42а+28b
В) -1,2х-2y+2,4
Г) -1,2k+0,8m-4
Д) -55а+44b
Е) 27x-18y
4 votes
Thanks 5
superpomiroka
А) 4(5m-3n)=4*5m-4*3n=20m-12n=8mn
Б) -7(6a-4b)=-7*6a-(-7)*4b=-42a-(-28)b=-14ab
B) -0,4(3x+5y-6)=-0,4*3x+(-0,4)*5y-(-0,4)*6=-1,2x+(-2)y-(-2,4)=-4,6xy
Г) -0,4(3k-2m+10)=
Д) -11(5a-4b)=
E) 9(3x-2y)=
6 votes
Thanks 9
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Answers & Comments
Б)-42а+28b
В) -1,2х-2y+2,4
Г) -1,2k+0,8m-4
Д) -55а+44b
Е) 27x-18y
Б) -7(6a-4b)=-7*6a-(-7)*4b=-42a-(-28)b=-14ab
B) -0,4(3x+5y-6)=-0,4*3x+(-0,4)*5y-(-0,4)*6=-1,2x+(-2)y-(-2,4)=-4,6xy
Г) -0,4(3k-2m+10)=
Д) -11(5a-4b)=
E) 9(3x-2y)=