Factorization: a × a × a-2a × a × B + ab × B

Factorization: a × a × a-2a × a × B + ab × B

simple form
=a(a^2-2ab+b^2)
=a(a-b)^2

Factorization: 1-2-3 + 3-6-9 + 5-10-15 + 7-14-21 / 1-3-5 + 3-9-15 + 5-15-25 + 7-21-35

The number is 1245

1 + 2 √ 3 + √ 5 / √ 3 + 3 + √ 5 + √ 15 factorization, urgent

1 + 2 √ 3 + √ 5 is the numerator and √ 3 + 3 + √ 5 + √ 15 is the denominator
The original formula = [(1 + √ 3) + (√ 3 + √ 5)] / (√ 3 + 1) (√ 5 + √ 3)
=1 / (√ 3 + 1) + 1 / (√ 5 + √ 3) (split)
=(√ 3-1) / 2 + (√ 5 - √ 3) / 2 (denominator rationalization)
=(√5-1)/2

1. Factorization 6 (a-b) ^ 2 minus 8 (a-b) ^ 3
2. Calculate 3A ^ (n + 1) - 6A ^ (n) + 9A ^ (n-1) divided by one third of a ^ (n-1)

1.6（a-b)^2-8（a-b)^3
=2(a-b)^2[3-4(a-b)]
=2(a-b)^2(3-4a-4b)
2.[3a^(n+1)-6a^(n)+9a^(n-1)]/a^(n-1)
=3a^2-6a+9

A sealed cuboid glass jar is filled with water of 18 cm, 10 cm wide and 5 cm high. Different sides of the glass jar are used as the bottom surface and placed on the table top, and the water content is very low
The minimum height is 2 cm. What is the maximum height of water?

7.2
The lowest is 18 and 10, and the highest is 5 and 10

In the equal ratio sequence {an}, if S3 = 12, S6 = 36, then S9=

S3 = a (1-Q ^ 3) / (1-Q) = 12s6 = a (1-Q ^ 6) / (1-Q) = a (1-Q ^ 3) (1 + Q ^ 3) / (1-Q) = 36 Division 1 + Q ^ 3 = 3Q ^ 3 = 2 carry in a (1-Q ^ 3) / (1-Q) = 12a / (1-Q) = 12s9 = a (1-Q ^ 9) / (1-Q) = [A / (1-Q)] [1 - (Q ^ 3) ^ 3] = - 12 * (1-8) = 84

The length of a rectangle is 5 / 3 decimeters, which is 4 / 1 decimeters more than the width. How many decimeters is its circumference?

One and nine tenths of a meter

What are the two types of punctuation

One is the dot, the other is the label

Who can give me 1000 words excellent composition

I have explored all over the world. Elephants will use the front end of their trunks to grab food and send it to the mouth. They will also use their trunks to drink water. Even after they fill their trunks with water, they will wash the mud on their bodies. When the weather is hot, dogs will stretch out their long tongues to speed up their breathing and expel heat One day, I was downstairs with my little friend

Why is one eighth plus two eighths equal to three eighths?

Add and subtract fractions, the denominator is the same, the denominator is the same, the numerator is added and subtracted. Hehe hehe. It can also be understood in this way: a cake is divided into eight parts. If you take one part, it is one eighth. If you take two more parts, now you have three eighths