Factorization of ab-2a-b + 2

Factorization of ab-2a-b + 2

ab-2a-b+2
=a(b-2)-(b-2)
=(a-1)(b-2)

Factorization: 2x ^ 2-36x-2a ^ 2 + AB + B ^ 2

Classmate, these are two questions
The previous common factor 2x ^ 2-36x = 2x (x-18)
Multiplication of the last cross
-a b
2a b
-2a^2+ab+b^2=(-a+b)(2a+b)
What's the problem

1+2+3+4+5+6+7+8+9+10.+1001+1002=?

=(1+1002)*1002/2=502503
Operation rules: (first item + last item) * number of items / 2

If x + 2y3 = y + 3z4 = Z + 5x5, then x: Y: Z=______ ．

The original equations are reduced to: x + 2y3 = y + 3z4x + 2y3 = Z + 5x5, and the results are: 4x + 5Y = 9z ① 10x − 10Y = 3Z ② ① × 2 + ②: 18x = 21z, x = 76z, ① × 5 - ② × 2: 45y = 39z, y = 1315, X: Y: z = 76z: 1315z: z = 35:26:30, so the answer is: 35:26:30

Reading extracurricular books is helpful to enrich and improve reading ability

Reading extracurricular books is helpful to improve reading ability
Ability cannot be enriched

The problem of leap year (2100)
It is reasonable to say that 2100 is not a leap year, but four years backward (four years forward), that is, 2096 (2104) is a leap year. Why is this? The knower pays a heavy reward

The Gregorian calendar is based on the earth's cycle around the sun. A year (solar year) has 365 days or 366 days, which is divided into 12 months. January, March, may, July, August, October and December are the major months, with 31 days in each month; April, June, September and November are the minor months, with 30 days in each month; February is the average year, with 28 days in each month, There are only 97 leap years (0.24219 × 400 = 96.876) in every 400 years because the earth's orbit around the sun is 365.24219 days (solar year)
According to this, three of the 100 "quasi leap years" which can be divided by four in every 400 years should be deducted
The best way that the calendar makers have come up with is to deduct four of the 100 "quasi leap years" that can be divided by 100, and then add back the "quasi leap year" that can be divided by 400 (which has been deducted once). In this way, 97 "quasi leap years" will become real leap years. This is the principle why the one that is divided by 100 is not a leap year, and the one that is divided by 400 is a leap year

Ten out of fifteen is 14 out of what?

Ten out of fifteen is 14 out of X
10x=15×14
x=21
Ten out of fifteen is 14 out of 21

Xiao Gang read a story book. He read 56 pages every day. After 4 days, he just read 8 / 11 of the whole book. How many pages are there in this book? How many pages are left?

Total 56 * 4 △ 8 / 11 = 308 pages
308-56 * 4 = 84 pages left

English translation
Hongya's business has become more and more popular. The small audio-visual stores, small building materials stores and bookstores nearby are unwilling to let Hongya specialize in beauty. They have changed their appearances and specialize in clothing, gradually forming a clothing street in the city. In recent months, the flow of customers has been increasing. At the weekend, customers come here to buy clothes, and the shop owners dream of laughing
Although the popularity of the clothing street has doubled the passenger flow, it has also enabled customers to compare their goods. The competition among stores has become increasingly fierce, and they have tried their best promotional strategies to attract customers. For a time, the advertising shops of "50% discount for the whole market", "jump price" and "clearance sale" have covered the whole street. After a while, some businesses feel that these strategies are not effective, and they play "buy one get one free", ”Seven nights later, one store announced the implementation of membership system, and the other two stores immediately launched VIP cards. In August, two stores set up a lucky draw, and other stores followed suit. In September, one store did not know where to invite some amateur models and held several fashion shows
Although Hongya is the oldest and most famous clothing store in the street, it can't stand the aggressive sales promotion of other stores. Although the sales volume didn't decline, it also stagnated. Zhang Weida decided to fight back
Please don't use the translator~

The business in Hongya was better and better.The little shops nearby such as video shops,building materials shops and book shops did not want Hongya monopolizeall the praises.They changed their facade...

26 degrees = expressed in degrees, minutes and seconds

48.26 degrees = 48 degrees 15.6 minutes = 48 degrees 15 minutes 36 seconds