A polynomial [(X & sup2; + 5x + 6) - (AX & sup2; - BX + C)] △ 3x = 2x + 1, the remainder is 0, and the value of a + B + C is obtained

A polynomial [(X & sup2; + 5x + 6) - (AX & sup2; - BX + C)] △ 3x = 2x + 1, the remainder is 0, and the value of a + B + C is obtained

The coefficient of: ((x \\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\- C) / 3x =

What is the necessary and sufficient condition for the quadratic equation y ﹤ 2 + 4Y + x = 0 to have no real root?

16-4x

What is the content of Kirchhoff theorem

Kirchhoff's law includes current law and voltage law
Law of current: in a lumped circuit, the algebraic sum of all branch currents flowing out of any node at any time is equal to zero. Law of voltage: in a lumped circuit, the algebraic sum of all branch voltages along any circuit at any time is equal to zero

Isn't y = arcsinx and x = siny the same function? Why does the textbook say that the inverse function of y = arcsinx is x = siny?
Isn't the inverse function of SiNx = y y = SiNx?

Y = SiNx means that x is a function of Y with y as the main term
The inverse function is required to change x into the main term, and then change the positions of X and y
x=arcsiny
The inverse function is y = arcsinx
SiNx = y and y = SiNx are the same function. What's the difference?

As shown in the figure, the surface area of the cube block is 36 square decimeters. Cut it along the dotted line into eight small cube blocks of equal volume, and the surface area increases______ Square decimeter

Cut 8 small cubes of equal volume along the dotted line, need to cut 3 times, each time cut 1, add 2 large cubes face, so a total of 3 × 2 = 6 face, is increased by 36 square decimeters. Answer: at this time, the surface area increased by 36 square decimeters. So the answer is: 36

How to do the two questions on page 23 of the fourth grade mathematics volume 2

1.38.14-(5.86+4.14)
2.4.587+(3.47+2.47)
3.24.63-4.63-1.85

Calculate the quadratic integral ∫ dy ∫ sin √ (x ^ 3) DX x [0, cubic √π] y [y ^ 2, cubic √π ^ 2]

The circumference of a rectangle is 26cm. If the length of the rectangle is reduced by 1cm and the width is increased by 2cm, it will become a square. Then how many cm are the length and width of the rectangle
1. The formula of the circumference of a rectangle is (). If the circumference is 26 cm, then the length 10 width = cm
2. The four sides of a square ()

Let the length of a rectangle be x and the width be y
X + y = 13, and X-1 = y + 2,
We get x = 8, y = 5
1. The formula of the circumference of a rectangle is (C = (a + b) × 2). If the circumference is 26 cm, then the length and width are 13 cm
2. Four sides of a square (7 cm)

The perimeter of the bottom surface of a column is 3.14 meters. To paint five such columns, each square meter has 0.5 kg. How many kg of paint do you need

3.14 × 3 × 5 × 0.5 = 23.55 (kg)

What is the usage of x ^ y in calculator?

For example, if you want to calculate the power of 6 to the power of 8, the key sequence is 6 → x ^ y → 8 →=