Question

calcule
1/2 x²+ 2/3 x² -5/6 x²=
-3/8 x +1/2 x- 1/8 x=

(x²/3 +2 x/5- 1/4)- (2 x²/3 -1/4)=
-2 x² -[- 5 x-(6+2 x -3 x²)]+ X- 2=

Answer 1

1/2 x²+ 2/3 x² -5/6 x²= 1/3 x²

-3/8 x +1/2 x- 1/8 x= 0

(x²/3 +2 x/5- 1/4)- (2 x²/3 -1/4)=
x²/3 + 2x / 5 - 1/4 - 2x² / 3 + 1/4 
2x / 5 - x² / 3

-2 x² -[- 5 x-(6+2 x -3 x²)]+ x- 2=
-2x² - ( -5x - 6 - 2x + 3x² ) + x - 2 
-2x² - ( 3x² - 7x - 6 ) + x - 2 
- 2x² - 3x² + 7x + 6 + x - 2 
- 5x² + 8x +4