2aX ^ 2-10ax-100a, do you think it's the same as me

2aX ^ 2-10ax-100a, do you think it's the same as me

2ax^2-10ax-100a
=2a(x²-5x-50)
=2a(x+5)(x-10)

The fourth power of 2aX - the second power of 10ax, the second power of Y + the fourth power of ay

2ax^4-10ax²y²+ay^4
=a(2x^4-10x^4y^4+y^4)

Molecules are the smallest particles that keep the chemical properties of substances. Take water as an example, why can't water molecules keep their physical properties

With the change of temperature, the physical properties of water will change, such as the change of state (solid, liquid, gas), as well as the change of density, etc., but no matter what the physical state, water exists in the form of water molecules, indicating that the molecules can not maintain the physical properties

I want to ask the formula of cattle eating grass
And other mathematical formulas (such as: chicken and rabbit in the same cage, travel problem, etc.)

In addition to summarizing the corresponding solutions of these two types of problems, we should also cultivate the ability to solve practical problems by using the problem-solving ideas of "cattle grazing problem"

If real numbers a and B satisfy log2 (A-2) + log2 (2b-2) = 3, then the minimum value of a + B is______ ．

∵ log2 (A-2) + log2 (2b-2) = 3, ∵ log2 (A-2) (2b-2) = 23 = 8, changed to (A-2) (B-1) = 4, ∵ a + B = (a − 2) + (B − 1) + 3 ≥ 2 (a − 2) (b − 1) + 3 = 24 + 3 = 7, if and only if a = 4, B = 3, take the equal sign, so the answer is: 7

There's another one. Two ninths of a number is five sixths of 36. This number? Equation
There is a rectangle 8 cm long and 5 cm wide. If you increase the length and width by half, what is the area of the rectangle now? What is the area of the rectangle now? Give it to me in ten minutes!

Let this number be X
2/9x=36x5/6
x=135
Or:
36x5/6÷2/9=135
two
Now the area of the rectangle is: (8 + 8X1 / 2) x (5 + 5x1 / 2) = 90 (square centimeter)
Original rectangular area: 8x 5 = 40 square centimeters
The area of the original rectangle is the present: 40 △ 80 = 0.5 = 50%

A is an odd number, B is an even number, the following result is that the odd number formula is ()
A. 3a+bB. 2a+bC. 2（a+b）

A. A is odd, then 3a is odd, B is even, odd + even = odd, which conforms to the meaning of the problem; B. because 2a is even, B is even, even + even = even, which does not conform to the meaning of the problem; C. according to the definition of even, 2 (a + b) must be even, so it does not conform to the meaning of the problem

12-14-18-116-132-164=______ ．

12-14-18-116-132-164, = 12 - (14 + 18 + 116 + 132 + 164), = 12 - (12-14 + 14-18 + 18-116 + 116-132 + 132-164), = 12-12 + 164, = 164

() multiplied by 6 equals four fifths

Two fifths

How to divide 7b's one in square and 3a-b's C

1/(7b^2)+c/(3a-b)
=(3a-b)/(7b^2)(3a-b)+7b^2 *c/(7b^2 *(3a-b))
=[(3a-b)+7cb^2]/[7b^2 *(3a-b)]