|
|
|
|
3)
|
5.(10x2 + 12x + 9) + 2.(11x2 + 15x
+ 10)
|
|
|
4)
|
(5x2 - 9x + 20) + 2.(18x2 - 16x +
4)
|
|
|
5)
|
(18x2 - 19x - 20) - (18x2 - 10x +
17)
|
|
|
6)
|
-2.(-8x2 + 5x + 18) +5. (-13x2 + 19x
)
|
|
|
7)
|
20x4 - 13xy + 2.(5xy - 10x4
+ 15x3 )
|
|
|
8)
|
(13x2 y + 9xy - 6) –3. (12x2 y+
11xy )
|
|
|
9)
|
3.(20x2 y2- 13x + 4) - (13x2
y2- 7x - 7)
|
|
|
10)
|
9x6 -
4x4 - 4x6 -
6x + 12) - (-10x6 )
|
|
|
11)
|
(-11x2 - 16x + 15) -2 (-17x2 - 10x2
)
|
|
|
12)
|
(-6x2 y2- 14x - 5) - (4x2
y2- 17x - 12)
|
|
|
13)
|
(-5x2 + 8xyz + 4) –3. (14x2 -
18xyz )
|
|
|
14)
|
3.(- 13x3 + 18x4) - (-17x6
+ 5x3 + 12x4)
|
|
|
15)
|
-10x2 - 10x + 10 +6. (-x2 + 14x -
20)
|
|
|
16)
|
-10x5 + 15x2 + 5 - (11x6
+ 12x5 - 6)
|
|
|
17)
|
18x2 y- 10xz + 9 +17x2 y- 6xz - 17
|
|
|
18)
|
(-18x7 - 11 - 6x3) - (-12x7
+ 6x3 + 6)
|
|
|
19)
|
-19x2 + 5x + 15 + 5.(7x2 - 17x +
20)
|
|
|
20)
|
18x2 y2+ 20x y2 - 8 + 8x
y2 – 8-(-7x y2 )
|
|