Find the solution set of equation x ^ 2 - (a + 1) x + a = 0,

Find the solution set of equation x ^ 2 - (a + 1) x + a = 0,

(x-1)(x-a)=0

If a is the solution of the equation x2 + X-5 = 0, then the value of A2 + A + 1 is______ ．

∵ A is the solution of the equation x2 + X-5 = 0, ∵ A2 + a-5 = 0, ∵ A2 + a = 5, ∵ A2 + A + 1 = 5 + 1 = 6

Given 3 ^ x = 2,2 ^ x = 1,3 ^ y = 4,2 ^ Y5, find 12 ^ 3x-y
Come on
Given 3 ^ x = 2,2 ^ x = 1,3 ^ y = 4,2 ^ y = 5, find 12 ^ 3x-y

12^(3x-y)=4^(3x-y)*(3^(3x-y)=2^(6x-2y)*3^(3x-y)=(2^x)^6*(2^y)^(-2)*(3^x)^3*(3^y)^(-1)=1/50

The diameter of the bottom of a cylinder is 12 cm and the height is 10 cm

What is the area of the two bottom surfaces
(12 / 2) × (12 / 2) × 3.14 × 2 = 226.08 square centimeter
What is the lateral area
12 × 3.14 × 10 = 376.8 square centimeter
What is the surface area
376.8 + 226.08 = 603.6 square centimeter

If a and B are coprime numbers and a × B = AB, then the greatest common factor of a and B is______ The least common multiple is______ A．a   B．b   C．ab   D.1．

If a and B are coprime numbers and a × B = AB, then the greatest common factor of a and B is 1 and the least common multiple is ab; so the answer is D, C

A pair of corresponding sides of two similar triangles are 35cm and 14cm respectively, and the difference of their perimeter is 60cm, then the perimeter of the larger triangle is 60cm______ cm．

∵ two similar triangles have a pair of corresponding sides of 35cm and 14cm respectively, and the similarity ratio is 52. If the three perimeter of the larger triangle is 5x, then the smaller one is 2x. From the meaning of the title, we get that 5x-2x = 60, ∵ x = 20, so the perimeter of the larger triangle is 20 × 5 = 100cm

The greatest common factor of two numbers is 12, and the least common multiple is 60. What is the sum of these two numbers?

60÷12=5
Because 5 = 1 × 5
So these two numbers are: 1 × 12 = 12 and 5 × 12 = 60
The sum of two numbers is: 12 + 60 = 72

For the following statements, if you assign 10 to variables K1 and K3 and 20 to variables K2 and K4, you should input data in mode (). Here is the program
int k1,k2,k3,k4;
scanf("%d%d",&k1,k2);
scanf("%d,%d",&k3,k4);
A.1020 B.10 20 102010 20
C.10,20 D.10 20 10,20 10,20
Why D?

D is a pair of 10, 20 corresponding to% d% d 10, 20 corresponding to% d% d

New goal grade 7 Volume 1 English unit 4 words

Unit 4 words and phrases
1. Where adv
2. Table n
3. Bed n
4. Dresser n
5. Bookcase
6. Sofa sofa n
Chair n
8. Drawer drawer n
9. Plant n
10. Under in prep
11. They are pro
On top of
Know v
Bag n
Math n
16. Alarm clock
17. CD (= compact disc) abbr
18. Video recording; video n
19. Tape n
20. Video tape
21. Hat hat n
Take away; take to v
Things n
24. To face; to; to reach prep
Mom (informal) Mom n
Can; can; can; can
Bring; bring; bring
28. Some; some pron. & adj
29. Need needs v
Floor n
31. Room n
32. TV (= television) TV; TV abbr
Desk n

It is known that the parabola y = x2-2x + a (A & lt; 0) intersects the y-axis at point a, and the vertex is m. the line y = 1 / 2x-a intersects the z-axis, the y-axis intersects BC, and the line am intersects at point n
1. Use
1. Using the algebraic expression containing a to express m n
2. As shown in the figure, fold △ NAC along the y-axis, the corresponding point n 'of weak point n just falls on the parabola, an' intersects with X-axis at D, connect CD, and calculate the value of a and the area of quadrilateral adcn
3. On the parabola y = x2-2x + a (a < 0), is it pure at a point P, so that the quadrilateral with pacn as vertex is a parallelogram? If it exists, find out the coordinates of point P. hurry up, thank you

1. The coordinates of point a are (0, a), the coordinates of vertex m are (1, A-1), the coordinates of point B are (2a, 0), and the coordinates of point C are (0, - a)
It is convenient to find out the intersection of the line am and the line y = 1 / 2x-a at n by two-point formula
2. What's the picture?