第1个回答 2022-08-01
因式分
1.m2(p-q)-p+q
2.(2m+3n)(2m-n)-4n(2m-n)．
3.(x+2y)2-x2-2xy．a(ab+bc+ac)-abc．
4.ab-a-b+1．
5.xyz-xy-xz+x-yz+y+z-1．
6.x4-2y4-2x3y+xy3．
7.abc(a2+b2+c2)-a3bc+2ab2c2．
8.(a-b-c)(a+b-c)-(b-c-a)(b+c-a)．
9.a2(b-c)+b2(c-a)+c2(a-b)．
10.a(a+b)(a-b)-a(a+b)2．
12．(x2-2x)2+2x(x-2)+1．
13．2acd-c2a-ad2．
14．(x-y)2+12(y-x)z+36z2．
15．x2-4ax+8ab-4b2．
16．a2b2+c2d2-2abcd+2ab-2cd+1．
17．(ax+by)2+(ay-bx)2+2(ax+by)(ay-bx)．
18．(1-a2)(1-b2)-(a2-1)2(b2-1)2．
19．3x4-48y4．
20．(x+1)2-9(x-1)2．
计算题：
1.x+2=3
2.x+32=33
3.x+6=18
4.4+x=47
5.19-x=8
6.98-x=13
7.66-x=10
8.5x=10
9.3x=27
10.7x=7
11.8x=8
12.9x=9
13.10x=100
14.66x=660
15.7x=49
16.2x=4
17.3x=9
18.4x=16
19.5x=25
20.6x=36
解方程组：
1.5x+3y=8,3x+5y=8
2.6x-7y=5,x+2y=4
3.10x-8y=14,x+y=5
4.4x+7y=3,x+y=0
5.3x+y=10,7x-y=20
6.44x+10y=27,x+y=1
7.8x-y=0,x+y=18
8.11x-y=12,11y-x=-12
9.5x+6y=27,2x+3y=12
10.7x-2y=4,x+2y=12
11.(2x+y)-5y=2,2x-5y=0
12.7x-3y=3,3x+2y=21
13.7x+2y=21,y-6x=1
14.10x-8y=0,3x-2y=2
15.3x+y=10,5x-7y=8
16.66x+17y=3967
17.18x+23y=2303
18.44x+90y=7796
19.76x-66y=4082
20.67x+54y=8546