Factorization of (a-b) ^ 3 - (a-b)

Factorization of (a-b) ^ 3 - (a-b)

（a-b）^3-（a-b)=（a-b)[（a-b）^2-1]=(a-b)（a-b+1）（a-b-1）

Factorization - (a-b) ^ 2 - (B-A) ^ 3
By the way, help me with these questions
Factorization 4x ^ 3 + x ^ 2-16x-4
4a^2-( )^2=(2a+3/1b)(2a-3/1b)
Factorization (a ^ 2 + a) ^ 2-9 (a ^ 2 + a) + 20

﹣(a-b)^2-(b-a)^3
=﹣(a-b)^2*(1+(b-a))
= -(a-b)^2*(1+b-a)

The opposite number of the fourth power of 1 △ the second power of (- 5) × five thirds of the negative + | 0.8-1|

The opposite number of the fourth power of 1 △ the second power of (- 5) × five thirds of the negative + | 0.8-1|
=-1÷25x(-5/3)+0.2
=1/25x5/3+1/5
=1/15+3/15
=4/15

1. When x = 3, the value of the algebraic formula ax ^ 3 + BX + 8 is 12. When x = 3, the value of the algebraic formula ax ^ 3 + bx-5
2. If (x / 3) = (Y / 4) = (Z / 5), and 4x-5y + 2Z = 10, find the value of 2x-5y + Z

1,ax^3+bx+8=12
So ax ^ + BX = 4
Then ax ^ 3 + bx-5 = - 1
2. Let x = 3k, y = 4K, z = 5K
So 12k-20k + 10K = 10
k=5
So 2x-5y + Z = 6k-20k + 5K = - 9K = - 45

A certain commodity is priced at a profit of 0.4, and then sold at a 20% discount. The selling price is 80 yuan. How much is the cost of this commodity?

Suppose the cost of the commodity is x, that is, the original price of the commodity is 1.4x, and the discount price is 1.4 * 0.8 * x = 80, that is, the cost of the commodity is 71.43 yuan

234760000 yuan, which can be expressed by scientific notation. Why
I don't know much about it. I hope you can give me some advice

2.35x10 octave

Math problem of grade one! Speed
A 5-meter-long chair leans against a vertical wall, and the lower end of the ladder is 1.4 meters away from the lower end of the wall. If the top of the ladder falls 0.8 meters, will the lower end of the ladder also slide 0.8 meters to the left?
Wrong. It's the second day of junior high school. Do you need to be so sensitive to a number?

The height of the top of the ladder from the ground is (5 * 5-1.4 * 1.4) square root = 4.8
8 to 4
Then the distance between the lower end of the ladder and the lower end of the wall is (5 * 5-4 * 4) square root = 3
Sliding 3-1.4 = 1.6m

As shown in the figure, in square ABCD, points E and F are on AB and BC respectively, and AE = BF. AF and de intersect at point g. try to determine the relationship between AF and de and give explanation

Conclusion: AF = de and AF ⊥ De, from the congruence of △ ABF and △ DAE, we can get ⊥ AFB = ⊥ DEA, AF = De, because ⊥ AFB + ⊥ BAF = 90 °, so ⊥ DEA + ⊥ BAF = 90 °, in △ AEG, ⊥ age = 90 °, that is AF ⊥ De, so AF = de and AF ⊥ De

How to calculate 16 / 27 times 5 plus 11 / 27 divided by 1 / 5

16/27x5+11/27÷1/5
＝16/27x5+11/27x5
=(16/27+11/27)x5
=1x5
=5

A question on filling in the blanks of the number axis in the seventh grade of mathematics volume 1
On the number axis, the distance from the point of 2.5 to the origin is____ Unit length, on the number axis, the distance from - 3 and 3 / 4 point to the origin is____ A unit length

On the number axis, the distance from the point of 2.5 to the origin is__ 3__ Unit length, on the number axis, the distance from - 3 and 3 / 4 point to the origin is__ Three and three fourths__ A unit length
in short
The distance from the point of X to the origin is | x | units