The multiplication, division and factorization of algebraic expressions in the first volume of eighth grade mathematics ... Let the ten digits be X, then there is the square of (10x+6)-the square of (10x+4) = 220, and X is 5.
There are five courses urgently needed in the eighth grade last semester: multiplication and division of algebraic expressions, factorization and simplified evaluation (including the application of multiplication and division algebra). Factorization: 1. A 3-4a2。 Multiplication and division of -A 3-2A 2-A algebraic expression: 3. (2Y- 1) (4Y。 =-a(a+ 1)^2 =(4y^2+ 1)(4y^2- 1)= 16y^4- 1 4。 (a+b-c)(a+b+c) 5.a^2+b^2=25，Ab= 12。 Find the solution of (1) A+B (2) A 2-B 2 = (A+B) 2-C 2: (1) (a+b) 2 = a 2+b.2 = a 2+b 2-2ab = 25-24 = ......
Mathematical factorization calculation in the second volume of the eighth grade. 2xy+9-x2-y2； Solution: 2xy+9-x2-y2 = 9-x2+2xy-y2 = 9-(x * 2-2xy+y2) = 3 2-(x-y) 2 = (3+x-y) (3-)
Mathematical factorization calculation problem x? +9x+20
=(x+4)(x+5)
Grade 7 1 factorization problem (x+2)? (x-2)？
=[(x+2) (x-2)]？
=[X？ -4]?
=(X？ )? -8X？ + 16
But it's not that simple after solving it.
Two factorization calculation problems in grade seven (x-2y+3) (x+2y-3) = x2-(2y-3) 2 = x2-4y2+12y-9.
(2x+3)？ -(2x-3)？ =(2x+3+2x-3)(2x+3-2x+3)= 4x * 6 = 24x
In the past eight years, I have worked on math problems 75 ÷ [138 ÷ (100-54)] 85× (95-1440 ÷ 24).
80400-(4300+870÷ 15) 240×78÷( 154- 1 15)
1437×27+27×563 〔75-( 12+ 18)〕÷ 15
2 160÷〔(83-79)× 18〕 280+840÷24×5
325÷ 13×(266-250) 85×(95- 1440÷24)
58870÷( 105+20×2) 1437×27+27×563
8 1432÷( 13×52+78) [37.85-(7.85+6.4)] ×30
156×[( 17.7-7.2)÷3] (947-599)+76×64
36×(9 13-276÷23) [ 192-(54+38)]×67
[(7. 1-5.6)×0.9- 1. 15]÷2.5 8 1432÷( 13×52+78)
5.4÷[2.6×(3.7-2.9)+0.62] (947-599)+76×64 60-(9.5+28.9)]÷0. 18 2.88 1÷0.43-0.24×3.5 20×[(2.44- 1.8)÷0.4+0. 15] 28-(3.4 / kloc-0/.25×2.4) 0.8×〔 15.5-(3.2 1 5.79)〕 (3 1.8 3.2×4)÷5 194-64.8÷ 1.8×0.9 36.72÷4.25×9.9 3.4 16÷(0.0 16×35) 0.8×[( 10-6.76)÷ 1.2]
( 136+64)×(65-345÷23) (6.8-6.8×0.55)÷8.5
0. 12× 4.8÷0. 12×4.8 (58+37)÷(64-9×5)
8 12-700÷(9+3 1× 1 1) (3.2× 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26) 120-36×4÷ 18+35
(284+ 16)×(5 12-8208÷ 18) 9.72× 1.6- 18.305÷7
4/7÷[ 1/3×(3/5-3/ 10)] (4/5+ 1/4)÷7/3+7/ 10
12.78-0÷( 13.4+ 156.6 ) 37.8 12-700÷(9+3 1× 1 1) ( 136+64)×(65-345÷23) 3.2×( 1.5+2.5)÷ 1.6
85+ 14×( 14+208÷26) (58+37)÷(64-9×5)
(6.8-6.8×0.55)÷8.5 (284+ 16)×(5 12-8208÷ 18)
0. 12× 4.8÷0. 12×4.8 (3.2× 1.5+2.5)÷ 1.6
120-36×4÷ 18+35 10. 15- 10.75×0.4-5.7
5.8×(3.87-0. 13)+4.2×3.74 347+45×2-4 160÷52
32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
[(7. 1-5.6)×0.9- 1. 15] ÷2.5 (3.2× 1.5+2.5)÷ 1.6
5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷( 12-7.2)-6
3.2×6+( 1.5+2.5)÷ 1.6 (3.2× 1.5+2.5)÷ 1.6
5.8×(3.87-0. 13)+4.2×3.74
33.02-( 148.4-90.85)÷2.5
Seven math problems are urgently needed 100! 1、5+2 1*8/2-6-59
2、68/2 1-8- 1 1*8+6 1
3、-2/9-7/9-56
4、4.6-(-3/4+ 1.6-4-3/4)
5、 1/2+3+5/6-7/ 12
6、[2/3-4- 1/4*(-0.4)]/ 1/3+2
7、22+(-4)+(-2)+4*3
8、-2*8-8* 1/2+8/ 1/8
9、(2/3+ 1/2)/(- 1/ 12)*(- 12)
10、(-28)/(-6+4)+(- 1)
1 1、2/(-2)+0/7-(-8)*(-2)
12、( 1/4-5/6+ 1/3+2/3)/ 1/2
13、 18-6/(-3)*(-2)
14、(5+3/8*8/30/(-2)-3
15、(-84)/2*(-3)/(-6)
16、- 1+2-3+4-5+6-7
17、-50-28+(-24)-(-22)
18、- 19.8-(-20.3)-(+20.2)- 10.8
19、0.25- +(- 1 )-(+3 )
20、- 1-〔 1-( 1-0.6÷3)〕×〔2-(-3)×(-4)〕
2 1、 10÷(-4)-42-(-8)÷(- 1)3
22、-32-(-3) 2-(-3)3+(- 1)6
23、3×(-2)2+(-2×3)2+(-2+3)2
24、(- 12)÷4×(-6)÷2
25、(- 12)÷4×(-6)×2
26、75÷〔 138÷( 100-54)〕
27、85×(95- 1440÷24)
28、80400-(4300+870÷ 15)
29、240×78÷( 154- 1 15)
30、 1437×27+27×563
3 1、〔75-( 12+ 18)〕÷ 15
32、2 160÷〔(83-79)× 18〕
33、 280+840÷24×5
34、325÷ 13×(266-250)
35、85×(95- 1440÷24)
36、58870÷( 105+20×2)
37、 1437×27+27×563
38、8 1432÷( 13×52+78)
39、[37.85-(7.85+6.4)] ×30
40、 156×[( 17.7-7.2)÷3]
4 1、(947-599)+76×64
42、36×(9 13-276÷23)
43、-(3.4 1.25×2.4)
44 、0.8×〔 15.5-(3.2 1 5.79)〕
45、(3 1.8 3.2×4)÷5
46、 194-64.8÷ 1.8×0.9 36.72÷4.25×9.9
47、3.4 16÷(0.0 16×35)
48、 0.8×[( 10-6.76)÷ 1.2]
49、( 136+64)×(65-345÷23)
50、(6.8-6.8×0.55)÷8.5
5 1、0. 12× 4.8÷0. 12×4.8
52、(58+37)÷(64-9×5)
53、8 12-700÷(9+3 1× 1 1)
54、(3.2× 1.5+2.5)÷ 1.6
55、85+ 14×( 14+208÷26)
56、 120-36×4÷ 18+35
57、(284+ 16)×(5 12-8208÷ 18)
58、 9.72× 1.6- 18.305÷7
59、4/7÷[ 1/3×(3/5-3/ 10)]
60、(4/5+ 1/4)÷7/3+7/ 10
6 1、 12.78-0÷( 13.4+ 156.6 )
62、 37.8 12-700÷(9+3 1× 1 1)
63、( 136+64)×(65-345÷23)
64、3.2×( 1.5+2.5)÷ 1.6
65、85+ 14×( 14+208÷26)
66、(58+37)÷(64-9×5)
67、(6.8-6.8×0.55)÷8.5
68、(284+ 16)×(5 12-8208÷ 18)
69、0. 12× 4.8÷0. 12×4.8
70、(3.2× 1.5+2.5)÷ 1.6
7 1、 120-36×4÷ 18+35
72、 10. 15- 10.75×0.4-5.7
73、5.8×(3.87-0. 13)
74、+4.2×3.74 347+45×2-4 160÷52
75、32.52-(6+9.728÷3.2)×2.5 87(58+37)÷(64-9×5)
76、[(7. 1-5.6)×0.9- 1. 15] ÷2.5 (3.2× 1.5+2.5)÷ 1.6
77、5.4÷[2.6×(3.7-2.9)+0.62] 12×6÷( 12-7.2)-6
78、3.2×6+( 1.5+2.5)÷ 1.6 (3.2× 1.5+2.5)÷ 1.6
79、5.8×(3.87-0. 13)+4.2×3.74
80、33.02-( 148.4-90.85)÷2.5
8 1、23+(-73)
82、(-84)+(-49)
83、87+(-2.04)
84、4.23+(-7.57)
85、(-7/3)+(-7/6)
86、9/4+(-3/2)
87、3.75+(2.25)+5/4
88、-3.75+(+5/4)+(- 1.5)
89、(- 17/4)+(- 10/3)+(+ 13/3)+( 1 1/3)
90、(- 1.8)+(+0.2)+(- 1.7)+(0. 1)+(+ 1.8)+(+ 1.4)
9 1、(+ 1.3)-(+ 17/7)
92、(-2)-(+2/3)
93、|(-7.2)-(-6.3)+( 1. 1)|
94、|(-5/4)-(-3/4)|-| 1-5/4-|-3/4|)
95、(-2/ 199)*(-7/6-3/2+8/3)
96 、( 4a)*(-3b)*(5c)* 1/6
97、3/7 × 49/9 - 4/3
98、8/9 × 15/36 + 1/27
99、 12× 5/6 – 2/9 ×3
100、8× 5/4 + 1/4
You can work out the answer yourself. You are tired.
Algebraic expression multiplication and factorization in eighth grade mathematics (MX+8) (2-3x) = 2mx-3mx2+16-24x.
2mx-24x=0 because it does not contain x items.
m= 12
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