How to find the area of the geometric figure point surrounded by the image and coordinate axis of equation x = 3 and equation y + 4 = 0?

It's very simple. Draw a rectangle with a length of 4 and a width of 3, so the area is 12

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1. LXL Lyl = 1,
2. Draw the image of the function y = LXL + 3, and use the image to answer the following questions: (1) when x is the value of y = LXL + 3, which value does Y increase with the increase of X (2) does the function y = LXL + 3 have a maximum value? Does the function y = LXL + 3 have a minimum value? (3) what is the maximum value of the function y when x is? It's urgent today·····
3. What graph is the curve represented by equation √ 1-lxl = √ 1-y (some numbers, x, y are all in the root sign)
4. Draw a rough image of y = l1-x & # 178; L / (1-lxl). Please tell me how to draw it,
5. When the line y = KX + B is rotated 90 degrees anticlockwise around the origin, the linear equation is
6. When the line x + 2y-2 = 0 is rotated 90 ° anticlockwise around the origin, the linear equation is______ ．
7. Find the curve xy = - 1 and rotate 45 ° anticlockwise around the origin
8. The curve xy = - 1 is obtained by rotating 45 ° anticlockwise around the coordinate origin
9. The distance from the moving point m to the fixed point a (- 3,0) is two times of the distance to the origin. The trajectory of the moving point m is a curve C. The equation of the curve C is obtained
10. When a, B and C satisfy what conditions, the curve of equation (x-a) ^ 2 + (y-b) ^ 2 = R ^ 2 passes through the origin When a, B and C satisfy what conditions, the curve of equation y = ax ^ 2 + BX + C passes through the origin
11. The area of the figure represented by the equation LXL + Lyl = 1 is?
12. What is the area of the area enclosed by the curve expressed by the equation LXL / 4 + Lyl / 3 = 1
13. I = ∫∫ (D is the integral region) | √ (X & # 178; + Y & # 178;) - 1| D σ is calculated. The region D is surrounded by the curve y = √ (2x-x & # 178;) and X axis
14. Given that Ω = {(x, y) | x | ≤ 1, | y | ≤ 1}, a is a region bounded by the curve y = x & # 178; and y = x & # 189; if a point P is randomly cast on the region Ω Find the probability of P point falling into area A
15. General solution of differential equation (x ^ 2 cosx-y) DX + XDY = 0
16. General solution of differential equation XDY / DX + y = Xe ^ x
17. What's the difference between arithmetic shift left / right and logic shift left / right in Verilog
18. 5x-18=3-2x fast
19. A two digit number, exchange its ten digit number and one digit number, and the two digit number obtained is four times seven times of the original number. How many such two digits are there? speed
20. The function image is used to solve x, and the written calculation test is: (1) 5x-3 = x + 2; (2) 0.5x-4 = 3x + 2