Question

Tolong kerjakan semua pakai cara y
klo gk bisa sebisanya

Answer 1

C. 3(x - y) + (2x - 3y)
    3x - 3y + 6x - 9y
    3x + 6x - 3y - 9y
    9x - 12y
d. 2(a - 4b) - 6(a + 5b)
    2a - 8b - 6a - 30b
    2a - 6a - 8b - 30b
    - 4a + 22b
 

Answer 2

A. 2a(a-2b)+3a(b-4a)
=2a^2 - 4ab + 3ab - 12a^2
=( 2a^2-12a^2 ) - (4ab + 3ab )
= -10 a^2 - 1 ab

b. 4x + 1 - 3 ( y - 2x ) + 10y - 6
= 4x - 2 (y-2x) + 10y - 6
= 4x - 2y +4x + 10 y - 6
= (4x + 4x) + (10y - 2y) - 6
= 8x + 8y -6

c. 3 (x-y) + (2x - 3y)
= 3x - 3y + 2x - 3y
= 3x + 2x - 3y - 3y
= 5x - 6y

d. 2(a-4b) - 6 (a+5b)
= 2a - 8b - 6a - 30b
= 2a - 6a - 8b - 30 b
= -4a - 38b


#maaf kalau salah.