Question

1) 3a - 6b + 21a - 7b = ...
2) 4 + 12x - 17 - 9x = ...
3) 6x - 2y - 5x² - 5y + 11x = ...

Answer 1

1)3a+21a-6b-7b=
24a-13b
2) 4-17+12x-9x
-13+3=-10
3) 6x+11x-2y-5y-5x²
17x-7y-5x²

Answer 2

1. 3a -6b +21a -7b
     = 3a +21a -6b -7b
     = 24a -13b

2. 4 +12x -17 -19x
     = 12x -19x +4 -17
     = -7x -13

3. 6x -2y -5x² -5y +11x
   = -5x² +6x +11x -2y -5y
   = -5x² +17x -7y

Itu jawabannya.