The following polynomials are factorized: (1) x (X-Y) - Y (Y-X) (2) 9 (a-b) 2 + 12 (A2-B2) + 4 (a + b) 2

The following polynomials are factorized: (1) x (X-Y) - Y (Y-X) (2) 9 (a-b) 2 + 12 (A2-B2) + 4 (a + b) 2

(1) The original formula = x (X-Y) + y (X-Y) = (X-Y) (x + y); (2) the original formula = 9 (a-b) 2 + 12 (A2-B2) + 4 (a + b) 2 = [3 (a-b) + 2 (a + b)] 2 = (5a-b) 2

The final easy questions of mathematics volume 1 in grade 2
Only integral part and a function part of the two chapters of easy questions-----------------

Easy questions Easy to be tested?
Generally, this is not separated from the entrance examination
On a function of the main questions will be placed in: application or according to the rectangular coordinate system to give information to answer
The questions include: 1. Find the analytic formula of this practical problem / the analytic formula of rectangular coordinates
2: Find the value of K or B or both
3: Find whether a coordinate point (x, y) is within the function image
4: Find the value range (solution set) of a certain number in the analytic formula
5: Draw an image of a function
Integral to master the 1: power operation
2: General operations of integers
3: The two formulas of square difference and perfect square
4: Special questions of factorization
For example: 3: x + y = - 5, xy = 6, then the square of X + the square of Y is
It's hard work. Give me points
Downstairs! Plagiarize the dead

As shown in the figure, pull a 10 m long cable from the pole 6 m above the ground. How far is the fixed point of the cable on the ground from the bottom of the pole?

BC = AB2 - & nbsp; ac2 = 100-36 = 8 (m)

If the lengths of two right angles of a right triangle are 12 and 16 respectively, the height of its hypotenuse is ()
A. 6B. 3015C. 485D. 6013

According to the Pythagorean theorem, if the length of the oblique side is 2 = 162 + 122, then the length of the oblique side is 20, the area of the right triangle s = 12 × 16 × 12 = 12 × 20 × the height of the oblique side, then the height of the oblique side is 485, so C

Second grade mathematics volume 1 congruent triangle
Recently I learned that congruent triangles have corresponding sides and angles
I'm very familiar with the corresponding angle, but I'm not very familiar with it. Sometimes I only need to find one or two corresponding angles. I've seen the concept or I can't figure out who can help me?
I'm familiar with the corresponding side.

Tangent... Simple corresponding angle is the right corresponding angle... There's another way to teach you
The corresponding angle of △ ABC ≌ △ DEF is A-D B-E f-c. why can I write it down without reading it? As long as you want to know the corresponding angle of ∠ a
We know that ∠ A is the first position in △ ABC
So let's see that the corresponding angle of "△ def" ∠ A is also in the first position, which is ∠ D

The first volume of mathematics in grade two

Body

If the two roots of equation 3x ^ 2 + AX-1 = 0 are half of the two roots of equation AX ^ 2 + 6x + 4 = 0, then a =?

a=3

Ask for help with a mathematics multiple choice question in grade two of junior high school
1. The result of (x - 2x - 1 / x) / (1 - 1 / x) is ()
A.1/x B.x-1 C.x-1/x D.x/x-1

Which part of the formula in brackets do you put on the fraction line

In the following propositions, if the converse proposition is false, then ()
A. The distance from the point on the vertical bisector of a line segment to the point at both ends is equal
B. The distance from the point on the bisector to both sides of the corner is equal
C. Congruent triangles have the same perimeter
D. A triangle with equal sides is an isosceles triangle

The answer is C
The inverse proposition of C is that triangles with equal perimeter are congruent triangles
Obviously not
If you don't understand, you can continue to ask

Ask a math multiple choice question in grade two
If (x-4) (m) = XX + X + (n), M is a polynomial and N is an integer, then
A.M=x-3,N=12 B.M=x-5,N=20 C.M=x+3,N=-12 D.M=x+5,N=-20

The coefficient of X in DXX + X + (n) is 1, but only + 5 + (- 4) of D is 1