Question

Раскройте скобки:а)b+(-7m+2n)б)-3p-(-5x+2y)в) -(a-4b)+(-8x+3y)г)(a-9)-(13-a)+(11-a)

Answer 1

A) b-7m+2n
B)-3p+5х-2y
C)a+4b-8x+3y
D)a-9-13+a+11-a

Answer 2

1)b-7m+2n
2)-3p+5x-2y
3)-a+4b-8x+3y
4)-a+4b-8x+3y
5)a-9-13+a+11-a

Answer 3

a) b + (-7m + 2n) = b - 7m + 2n

b) -3p - (-5x + 2y) = -3p + 5x - 2y

в) +-(a - 4b) + (-8x + 3y) = - (a - 4b) - 8x + 3y = -a + 4b - 8x + 3y

г) (a - 9) - (13 - a) + (11 - a) = a - 9 - 13 + a + 11 - a = -10