Question

Помогте решить даю 45 баллов!! номер 3 и 5

Answer 1

Задание 3.
1) -1.2*3a=-3.6a
2) -0.8x*(-0.7)=0.56x
3) -5b*2.4c=-12bc
4) -6a * 0.7b * (-0.5c) = 2.1abc
5) -4/15 * x * 5/16 * (-y) = xy * (4/16)*(5/15) = xy/12
6) (1+3/5)x*(-15/32 * y) = -xy * (8/5) * (15/32) = -xy * (8/32)*(15/5)=-3xy/4
Задание 5.
1) 2*(x-7y+3z)=2x-14y+6z
2) -7*(5-a-4b)=-35+7a+28b
3) (c-8d+6d)*(-1.2)=(c-2d)*(-1.2)=-1.2c+2.4d
4) -0.6x*(-5+3m-1.4n) = 3x-1.8xm+0.84xn
5) -p*(-x+2y-4.6)=px-2py+4.6p
6) -8*(3/4 * a + 1/2 * b - 5/16 * c - 2.3) = -6a-4b+2.5*c+18.4

Answer 2

№ 3.
1) - 1.2*3a = -3.6*a
2) - 0.8x*( - 0.7) = 0.56*x
3) - 5b*2.4c = -12*b*c
4) - 6a * 0.7b * (- 0.5c) = 2.1*a*b*c
5) - 4/15 * x * 5/16 * (- y) = xy * (4/16)*(5/15) = xy/12
6) (1 + 3/5)x*( - 15/32 * y) = - xy * (8/5) * (15/32) = -xy * (8/32)*(15/5) = - 3xy/4

№5
1) 2*(x - 7y + 3z) = 2x - 14y + 6z
2) -7*(5 - a - 4b) = - 35 + 7a + 28b
3) (c - 8d + 6d)*( - 1.2) = (c - 2d)*( - 1.2) = -1.2c + 2.4d
4) - 0.6x*( - 5 + 3m - 1.4n) = 3x - 1.8xm + 0.84xn
5) - p*(- x + 2y - 4.6) = px - 2py + 4.6p
6) - 8*(3/4 * a + 1/2 * b - 5/16 * c - 2.3) = - 6a - 4b + 2.5*c + 18.4