Given x2 + X + 3 = 0, find the value of X5 + 3x4 + 2x3 + 2x2-10x

Given x2 + X + 3 = 0, find the value of X5 + 3x4 + 2x3 + 2x2-10x

∵x2+x+3=0，∴x2+x=-3，x5+3x4+2x3+2x2-10x=x3（x2+x）+2x4+2x3+2x2-10x=-3x3+2x4+2x3+2x2-10x=2x4-x3+2x2-10x=2x2（x2+x）-3x3+2x2-10x=-3x3-4x2-10x=-3x（x2+x）-x2-10x=9x-x2-10x=-x2-x=-（x2+x）=3．

Given that the values of the algebraic formula 0.7-0.1 x 0.4-3 X-1 and the algebraic formula X-1 are opposite to each other, find X

The concept of opposite number is that there are two numbers a and B respectively. If a = - B, then the two numbers are opposite to each other, so just bring the above two expressions into a = - B, and you can get the answer after checking!

If the values of 6x + 5 and 5 - 4x are equal, find the value of X

6x+5=5-4x
10x=0
x=0

If the value of the algebraic formula x2-5 is greater than - 5 and less than 1, then the value range of X is ()
A. X ＜ 0b. 0 ＜ x ＜ 12C. X ＞ 12D. X ＜ 0 or X ＞ 12

According to the principle of "finding in the middle of small and big size", we can know that the solution set of inequality system is 0 < x < 12. So we choose B

Add three numbers after 1992 to form a seven digit number, so that it can be integers of 2, 3, 5 and 11 respectively. The minimum number of seven digits is______ ．

Because it is divisible by 5 and 2, the number of one digit is 0; because it is divisible by 3, so you add up to the companion number of 3, so the sum of ten digits plus 100 digits is 3'6'9; and because the remainder of 1992 / 11 is 1, so the last two digits are 21, 32, 43, 54 So this number is 19922101992540 So the answer is: 1992210

A quadrilateral can be divided into two triangles by crossing the diagonal of a vertex of a quadrilateral; a pentagon or a hexagon can be divided into two triangles by crossing the diagonal of a vertex of a pentagon or a hexagon; and an n polygon can be divided into two triangles by crossing the diagonal of a vertex of an n polygon______ A triangle (represented by an algebraic expression containing n)

An n-polygon can be divided into (n-2) triangles by crossing the diagonal of a vertex

What's the difference between a quadrilateral ABCD and a quadrilateral with vertices a, B, C and D

The quadrilateral ABCD is a diamond, which specifies the alphabetic order of the vertices of the diamond
That is to say, from point a, clockwise or counterclockwise, the next vertex is point B, then point C, and then point D
The quadrilateral with a, B, C and D as the vertex is diamond, that is, the diamond surrounded by a, B, C and D does not specify the alphabetic order of each vertex. A may be followed by B or C. diamond ABCD and diamond abdc all belong to this kind of diamond
I'm not very clear. You may not understand
Another example is a
B◇C
D is a diamond ABCD, which is also a diamond surrounded by four vertices a, B, C and D
And a
C◇D
B belongs to a diamond surrounded by four vertices a, B, C and D, but it is not diamond ABCD, but diamond acbd

The negative 2.9 of real number 3 and the size of 1 / 27

The negative 2.9 power of 3 ＞ the negative 3 power of 3 = 1 / 27
So negative 2.9 of real number 3 is greater than 1 / 27
Have a good time

Several English multiple choice questions and fill in the blanks
( )1.-I called you this moring,but nobody answered.
-I_____ the flowers in my garden at that time.
A.watered B.was watering C.water D.am watering
( )2.It_________ heavily when I left the cinema.
A.rains B.will rain C.is raining D.was raining
( )3.He_______ his bicycle when it began to rain.
A.was riding B.is riding C.has ridden D.rides
( )4.The children______ a P.E. class on the playground when it suddenly began to rain.
A.have B.are having C.had D.were having
( )5.-Did you see a girl in white pass by just now ?
-No,sir.I________ a newspaper
A.read B.was reading C.would read D.am reading
2. Fill in the blanks
When I left, he was doing his homework
He _______ _______ his homework when left.
They were not playing basketball at that time
They _______ __________ basketball at that time.
Was he watching TV when you came back?
_______ he ________ TV when you came back?
Mary was cleaning the window while Tom and Jim were sweeping the floor
While Tom and Jim_________ _______ the floor,Mary_______ __________ the windows.

1.B
2.D
3.A
4.D
5.B
1.was doing
2.weren't playing
3.was ; watching
4.were sweeping; was cleaning

As shown in the figure, in rectangular ABCD, ad = 16cm, ab = 12cm. Moving point P starts from point a, moves along line AB and BC to point C, and the speed is 2cm / S; moving point Q starts from point B, moves along line BC to point C, and the speed is 1cm / s. P and Q start at the same time, and start timing from two points. Let the time of motion be t (s)
1. When point P moves on AB, what is the value of t such that Pb = BQ
2. Can point P catch up with point q? If so, find out the value of T. if not, explain the reason

Pb = ab-2t & nbsp; BQ = 1t & nbsp; ab-2t = 1t & nbsp; & nbsp; t = AB / 3 = 4S, let P catch up with Q in time t, & nbsp; 2t-12 = 1t & nbsp; t = 12s & nbsp; at this time, Q has only walked 12cm and has not reached C, so it can catch up