If the monomial - x4a-by2 and 13x3ya + B are of the same kind, then the product of the two monomials is () A. x6y4B. -x3y2C. −83x3y2D. −13x6y4

If the monomial - x4a-by2 and 13x3ya + B are of the same kind, then the product of the two monomials is () A. x6y4B. -x3y2C. −83x3y2D. −13x6y4

∵ the binomial - x4a-by2 and 13x3ya + B are of the same kind, ∵ 4A − B = 32 = a + B, ∵ the two binomial are: - x3y2 and 13x3y2 respectively, ∵ the product of the two binomial is: - 13x6y4

If the letters of two monomials and the exponents of the letters are the same, but the letters in the two formulas exchange positions, are they of the same kind?
For example, the square of 4x is y and the square of YX is y

The same category refers to the same letter, and the index of the same letter is the same
4X & # 178; y and YX & # 178; have the same letters, that is, they have only x and Y; in the two algebraic expressions, the exponent of X is the same, and the exponent of Y is the same
Therefore, these two algebraic expressions are of the same kind

If two monomials have the same letter and the index of the letter is the same, but the symbol before the letter is different, are they of the same kind

If two monomials have the same letter and the index of the letter is the same, but the symbol before the letter is different, they are of the same kind
Similar terms are independent of coefficients

The coordinates of the intersection of the line y = KX + B (k is not equal to 0) and the X axis are____ The coordinates of the point of intersection with the y-axis are____ .

The coordinate of the intersection of the line y = KX + B (k is not equal to 0) and the X axis is (- B / K, 0)_ , and the intersection of y-axis_ (0,b).
If the coordinate of the intersection point of X axis is y = 0 in y = KX + B, then x = - B / K can be solved
If the coordinate of the intersection point of Y axis is x = 0 in y = KX + B, then y = B can be solved

Application problems of quadratic equation of two variables
In order to effectively control the destruction of sandstorm and other bad weather to human living environment
A place in the north of China has decided to speed up afforestation, which is planned to take two years
The area of windbreak forest will be expanded from 20000 mu to 24200 mu, and the average annual growth rate will be calculated
Percentage?

Solution J: the average annual growth rate is 1
The percentage is X
2(x+1)^2=2.42
(x+1)^2=1.21
(x+1)=± 1.1
Because x + 1 > 0
So x = 0.1
A: the average annual growth rate is 10%

It takes 15 hours for a ship to sail 140 km downstream and 80 km upstream, and 15 hours for a ship to sail 60 km downstream and 120 km upstream?

The time is the same, so it can be seen that the time of sailing 80km (140-60) downstream is the same as that of sailing 40km (120-80) upstream. Then, sailing 80km upstream is equivalent to Sailing 160km (80 / 40 * 80) downstream for 15 hours, equivalent to Sailing 300km downstream, sailing speed 20km / h downstream, sailing speed 10km / h upstream = (20-10)

What is one plus two plus three times zero
Such as the title

Which question?
（1+2+3）×0=0
1+(2+3)×0=1
1+2+3×0=3

Xinhua Bookstore bought a batch of new books, sold half of the total in the first week and 250 in the second week

I'm not finished. I'll add

What does phoenix mean in ancient China

Phoenix is the king of birds in ancient Chinese legend. Phoenix is the general name of male and female, male is Phoenix, female is Phoenix, its general name is Phoenix, so the word "phoenix" is a compound word structure. Phoenix flying together, is a symbol of auspicious harmony, is a symbol of happiness. But when called Phoenix, it represents female. It is often used to symbolize auspicious

Four numbers: 3.3.8.8. How to make an equation equal to 24

8/（3-8/3）=24