The square of 6x-3x-18 is multiplied by the cross

The square of 6x-3x-18 is multiplied by the cross

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The square of 6x-3x-18
=3 (2x squared-x-6)
=3（X-2）（2X+3）
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-Multiplication of 3x square-15x + 108 by cross phase

-3x²-15x+108
=-3(x²+5x-36)
1 9
1 -4
-3x²-15x+108=-3(x+9)(x-4)

What is the meaning of static friction and dynamic friction, and what is the difference?

Firstly, it is clear that the condition of friction is mutual contact and elastic force
Static friction refers to the trend of relative motion between objects in contact, but there is no relative motion
Dynamic friction refers to the relative motion between objects in contact
So the main way to judge whether it is static friction or dynamic friction is whether there is (relative) motion

Find the law - 2,3, - 10,15, - 26,35

We can get the general formula X & sup2; multiplied by (- 1) to the power of - 1
X is 1, 2, 3, 4. To infinity

The sum of three continuous natural numbers is 75. What is the product of these three continuous natural numbers
Fourth grade. No equations. Thank you

The median is 75 △ 3 = 25
So these three numbers are 24, 25, 26
So their product is 24x25x26 = 15600

-The square of the root sign (2 / 7) multiplied by the square of the root sign (- 7 / 2) multiplied by the minus 2 power of the root sign (- 1 / 9)

-√（2/7）²×√（-7/2）²×（-√1/9）-²
=-2/7×7/2×1/(1/9)
=-1×9
=-9

67*169\168=

67*169/168
=67*(168+1)/168
=67*168/168+67/168
=67+67/168
=67 and 67 / 168

It is known that (X-2) (1-kx) does not contain a linear term of X, then the values of K are () a, - 1 B, - C, - D, 1

Firstly, the formula (X-2) (1-kx) is simplified to get
-kxx+(1+2k)x-2.
It is said that there is no linear term of X, that is, the coefficient of the linear term of X is 0, that is, 1 + 2K = 0, and the solution is k =
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Finding the domain of log2 (4x + 3) under y = root

Log2 (4x + 3) > = 0 and 4x + 3 > 0
The solution is x > = - 1 / 2

In the circulation decimal 0. ABC. (ABC circulation), it is known that the sum of the numbers in the first 1000 digits to the right of the decimal point is 4664, and there are two numbers in a, B and C that are equal. What is the circulation decimal?

The first 1000 bits were cycled 333 times,
So 333 (a + B + C) + a = 4664
4664/333=14.2
So a = 2
B+C=12
Because two numbers are equal, and assuming that one of B and C is 2, the other is equal to 10, so there must be B = C
So B = C = 12 / 2 = 6
So this circular decimal is 0.266266266266