Factorization 2x cubic-6x + 4

Factorization 2x cubic-6x + 4

2x³-6x+4
=2x³-2-6x+6
=2(x-1)(x²+x+1)-6(x-1)
=2(x-1)(x²+x+1-3)
=2（x-1)(x²+x-2）
=2（x-1)(x+2)(x-1）
=2（x-1)²(x+2)

The square of a minus 2Ab plus the square of B minus one factorization

1004x996 simple operation. Minus 1 / 3 x square + 3 y square, factorization

1004*996
=(1000+4)(1000-4)
=1000^2-4^2
=1000000-16
=999984
-x^2/3+3y^2
=-(1/3)(x^2-9y^2)
=-(1/3)(x+3y)(x-3y)

What is the derivative of SiNx? Velocity!
What about the tangent equation of the curve y = SiNx / X passing through (Wu, 0)

xcosx-sinx\x^2

A small cube is removed from a large cube which is composed of eight small cubes with an edge length of 1cm, and its surface area is______ ．

(1 + 1) × (1 + 1) × 6 = 24 (square centimeter); answer: the surface area of the figure is 24 square centimeter

Please calculate: mother squirrel picks 20 pine nuts every day on sunny days and 12 on rainy days. She picks 112 pine nuts for several days in a row, with an average of 14 per day. How many days are there sunny days and rainy days?

Suppose there are x sunny days and Y rainy days in these days. According to the meaning of the question, we get 20x + 12Y = 112x + y = 11214, and the solution is x = 2Y = 6. A: there are two sunny days and six rainy days in these days

Let x = e ^ (- t), the transformation equation x ^ 2 * d ^ 2Y / DX ^ 2 + X * dy / DX + y = 0
Let x = e ^ (- t), transformation equation (x ^ 2) * d ^ 2Y / DX ^ 2 + X * dy / DX + y = 0
The answer is d ^ X / dt ^ 2 + y = 0

x=e^(-t),dx/dt = -e^(-t) = -x
dy/dx = (dy/dt) / (dx/dt) = (-1/x) * dy/dt
d²y/dx² = (1/x²) * dy/dt + (-1/x) * d²y/dt² / (dx/dt) = (1/x²) * dy/dt + (1/x²) * d²y/dt²
= (1/x²) * [ dy/dt + d²y/dt² ]
x * dy/dx = - dy/dt,x² * d²y/dx² = dy/dt + d²y/dt²
Substituting into the original equation, we get: D & # 178; Y / dt & # 178; + y = 0

How many small squares with an area of 9 square centimeters can be cut out of a rectangular paper with a length of 21 cm and a width of 15 cm?

21 △ 3 = 7
15 △ 3 = 5
7 × 5 = 35

The cylindrical column in the gymnasium is 2.5 meters long and 5.2 meters high. Paint the side of it. How many square meters is the painting area of each column?

13 square meters

What operation symbol is added to 1,2,3,4,5 to make it equal to 90
Only add the operation symbol Oh, can't change the position, 1 2 can be regarded as 12, reward 20

There is no need to change the position or put two numbers together. (1) - (1 + 2 + 3 + 4!) + 5! = - 30 + 120 = 90 (2) (1 + 2) * 3 * (√ 4) * 5 = 90 (3) (- 1 + 2) * (3 / 4) * 5! = 1 * (3 / 4) * 120 = 90 (4) - 1-2-3-4! + 5! = - 6-24 + 120 = 90 If two numbers can be regarded as one