Question

ПОМОГИТЕ , ПОЖАЛУЙСТА !!!!!!!! ДАМ ЛУЧШИЙ ОТВЕТ !!!!!!!!

Answer 1

1)2(a+3b-7c)=2a+2×3b-2×7c=2a+6b-14c

2)0.4(1.3x-0.5y-1.3)=0.4×1.3x-0.4×0.5y-0.4×1.3=0.52x-2y-0.52

3)-0.8×(a-4d+3p)=-0.8a-4d×(-0.8)+3p×(-0.8)=-0.8a+3.2d-2.4p

4)-0.4×(-4b+3p-1.1c)=-0.4a×(-4b)+3p×(-0.4a)-1.1c×(-0.4a)=

=1.6ab-1.2ap+0.44ac

5)-m(-k+29n-38.9)=-m×(-k)+29n×(-m)-38.9×(-m)=mk-29mn+38.9m

6)(-10a) × (0.1+0.3x-2y)=-10a×0.1+ 0.3x × (-10a) - 2y × (-10a)=-1a--3xa+20yx

№2

1)-3(4+5m-6n)=-3×4+5m×(-3)-6n×(-3)=-12-15m+18n

2)-0.2(-14t+z-25y)=-0.2×(-14t)-0.2z-25y×(-0.2)=2.8t-0.2z+5y

3)0.1×(-3.1x+7.8y-9.6)=-3.1x×0.1+7.8y×0.1-9.6×0.1=-0.31x+0.78y-9.6

4) (-1.5p)×(0.7x-0.6y+0.5z)=(-1.5p)×0.7x-0.6y×(-1.5p)+0.5z×(-1.5p)=

=-3.5px+0.9py-0.75xz