Question

Tolong di jawab ya! soalnya di kumpulkan besok , soalnya no. 1,2,5,8,9,11,12,13

Answer 1

1. -(2xy+8x^2 y)+3x^2 y-5xy
=>-2xy-8x^2 y+3x^2 y-5xy
=>-5x^2 y-7xy

2. (-7mn-8n^2+2m^2n)+(-3m^2n-19n^2-6mn)
=> -13mn-27n^2-m^2n

no 1 sama 2 aja, panjang kalo sampe selesai

Answer 2

Klo gag salah..
5.   (4+2m) (m-8)
   = 4m - 32 + 2m² - 16m
   = 2m² + 4m - 16m - 32
   = 2m² - 12m - 32

8.   (x-2) (2x²-x+3)
= 2x³ -x +3x -4x² +2x -6
= 2x³ -4x² -x +3x +2x -6
= 2x³ -4x² +4x - 6