跪求200道初二的整式计算题
- 提问者网友:清羽墨安
- 2021-04-26 16:09
要有答案和解题过程的,没有的滚
- 二级知识专家网友:夢想黑洞
- 2021-04-26 17:13
3x2y•(-2xy3); (-5a2b3)•(-4b2c)
2a2(3a2-5b); (-2a2)(3ab2-5ab3)
(x+2)(x-3); (3x-1)(2x+1)
2(a-4)(a+3)-(2a+1)(a-1)
(x-6)(x的平方+x+1)-x(2x+1)(3x-1)
(2x+1)(x-1)-(x+2)(2x-1)
(2x+3)(2x-3) (-m+2n)(-m-2n)
(3x+2)(3x-2);(b+2a)(2a-b);(-x+2y)(-x-2y)
102×98; (m-5)(m+3); (2x-3)(2x-4)
(x+2y-3)(x-2y+3) (y+2)(y-2)-(y-1)(y+5)
(2a-b)(2a+b)-(3a-2b)(3a+2b)
(2x+y-z+10)(2x-y+z+10)
11x2+4x-1-x2-4x-5
若x2+3x-1=0,则x2+5x2+5x+8=
(2x4-4x3y-2x2y2)-(x4-2x2y2+y3)+(-x4+4x3y-y3)
化简:
(3y+2)(y-4)-3(y-2)(y-3);
(3x-2)(x-3)-2(x+6)(x-5)+31x2-7x-13
解不等式:
(3x+4)(3x-4)>9(x-2)(x+3)
(x+3)(x-7)+8>(x+5)(x-1)
当k=( )时,代数式x2-(3kxy+3y2)+ xy-8中不含xy项
已知A=x3-2x2+1,B=2x2-3x-1,求A-B的值.
实在找不出那么多题了,答案也找不着,字母后的数字为字母的系数
- 1楼网友:樣嘚尐年
- 2021-04-26 18:49
1, -(-2a²b)^4
=-(2a²b)^4
=-16a^8b^4
2,a³ x a^4 x a+(a²)^4+(-2a^4)²
=a^8+a^8+4a^8
=6a^8
3,6x² x 3xy
=18x^3y
4,2ab² x (-3ab)
=-6a²b^3
5,4x²y x (-xy²)³
=-4x^5y^7
6,(1.3 x 15^5)(3.8 x 10³)
7,(4a-b²)(-2b)
=2b^3-8ab
8,2x²(x-1/2)
=2x^3-x²
9,5ab x (2a-b+0.2)
=10a²b-5ab²+ab
10.,2a²-2/3 x a-4/9)(-9a)
=-18a^3+6a²+4a
11,(x-6)x (x-3)
=x²-9a+18
12,(x+1/2)(x-1/3)
=x²-x/6-1/6
13,(3x+2)(x+2)
=3x²+8x+4
14,(4y-1)(y-5)
=4y²-21y+5
15,(x-2)(x²+4)
=x^3+4x-2x²-8
=x^3-2x²+4x-8
16,(x-y)(x²+xy+y²)
=x^3-y^3
17,(x-3)(x-3)-6(x²+x-1)
=x²-6x+9-6x²-6x-6
=-5x²-12x+3
18,(2x+1)²-(x+3)²-(x-1)²+1
=4x²+4x+1-x²-6x-9-x²+2x-1+1
=2x²-8
19,(ax)^5÷(ax)³
=(ax)²
20,(x²)^5÷(x²)²
=(x²)^3
=x^6
21,(a³)² ÷(a²)³
=a^6÷a^6
=1
22,(ab²)³ ÷(-ab)²
=a^3b^6÷a²b²
=ab^4
23,24x²y÷(-6xy)
=-4x
24,(-5x²)² ÷5x^4
=25x^4÷5x^4
=5
25,7m(4m²p)² ÷7m²
=(4m²p)÷m
=4mp
26,(-12s^4 x t^6)÷(1/2 s²+3)²
27,(6x^4-8x³)÷(-2x²)
=4x-3x²
28,(8a³b-5a²b²)÷4ab
=2a²-5ab/4
29,(2/5 y³-7y²+2/3 y)÷2/3 y
=3y²/5-21y/2+1
30,(0.25a²b-1/2 a³b²-1/6 a^4b³)÷(-0.5a²b)
=1/2-ab-a²b²/3
31,(-2x²y³)² x (xy)³
=4x^6y^9
32,(2a+3b)(2a-b)
=4a²-4ab-3b²
33,5x²(x+1)(x-1)
=5x²(x²-1)
=5x^4-5x²
34,(2x+y-1)²
=(2x+y)²-2(2x+y)+1
=4x²+y²+4xy-4x-2y+1
35,59.8 x 60.2
=(60-0.2)×(60+0.2)
=3600-0.04
=3599.96
36,198²
=(200-2)²
=40000-400+4
=39604
37,(2a)³ xb^4 ÷12a³b²
=8a^3b^4÷12a²b²
=2ab²/3
38,(-2/3a^7 b^5)÷3/2 a²b^5
=-4a^5/9
39,(6/5 a³x^4 -0.9ax³)÷3/5 ax³
=2a²x-1.5
40,(7x²y³-8x³y²z)÷8x²y²
=7y/8-xz
41,12^13÷(3^10 x4^11)
=12^13÷12^10÷3
=12^3÷3
=3²×4^3
=144×4
=576
42,(5^4 x 3³-5³ x 3²+5² x 3)÷15
=5^3×3²-5²×3+5
=5(15²-15+1)
=5(15×14+1)
=5(211)
=1055
43,4(x+1)²-(2x+5)(2x-5)
=4x²+8x+4-4x²+25
=8x+29
44,2x (1/2x²-1)-3x(1/3 x²+2/3)
=x^3-2x-x^3-2x
=-4x
45,3(y-z)²-(2y+z)(-z+2y)
=3y²+3z²-6yz—(4y²-z²)
=4z²-6yx-y²
46,{x(x²y²-xy)-y(x²-x³y)}÷3x²y
=(x^3y²-x²y-x²y+x^3y²)÷3x^2y
=(2x^3y²-2x²y)÷3x²y
=2xy/3-2/3