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Anonymous users2024-02-111.(x+2)(x-3)-(x-4)(x+4)x²-x-6-x²+16
x+102.(3y+1)(3y-1)-(2y+3)(2y-3)9y²-1-4y²+9
5y²+83.(2a-b)(3a+2b)(2a+b)(2b-3a)（2a-b）（2a+b）（3a+2b）（2b-3a）（4a²-b²）（4b²-9a²）
16a b -27a to the 4th power - 4b to the 4th power (check the question) 4(3x-2) squared - (3x+2) squared.
9x²-12x+4-9x²-12x-4
24x3x-2) times (3x+2) squared.
3x-2)(3x+2)]²
9x²-4）²
36x to the 4th power - 72x + 16
x+2) (x-2) (x-squared +4).
x²-4）（x²+4）
x to the 4th power - 16
Have fun.
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Anonymous users2024-02-10x²1.Break the brackets directly.
Original = x +2x-3x-6-x +16
16-x2.Square Difference Formula.
Original = 9y -1-4y +9
5y²+83.It is easier to change the order first, the square difference formula, and then solve the brackets.
Original = (2a-b) (2a+b) (2b-3a) (2b+3a) (4a -b) (4b -9a).
16a b -36a 4-4b 4+9a b (a 4 refers to a fourth power, I can't play).
25a²b²-36a^4-4b^4
4.With the squared difference formula.
Original = (3x-2+3x+2)(3x-2-3x-2)6x times (-4).
24x5.The first two parentheses are squared for the formula, and then the squared difference formula is added.
Original = (x -4) (x +4).
x^4-16
It's so sour to play so many hands, Wanglou master, I hope you can make progress in your studies.
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Anonymous users2024-02-091.= x²-3x+2x-6- x²-4x+4x+16
x+102. 9y²-3y+3y-1-4y²+6y-6y+9
We haven't learned it yet after 5y +8.。。。
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Anonymous users2024-02-08The essence is the squared difference formula.
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Anonymous users2024-02-07【Typical Example Questions】1
1.Equation. The number of solutions is ()a
Inside, make. The value range of the valid is ()a
Known functions. The image is about straight lines.
Symmetry, then. Probably ()a
Known to be an acute triangle, then ().
With the size can not be determined.
5.If the function.
The minimum positive period is.
And the maximum value is obtained at that time, then ()a
The range is ()a
d.Answer: Make separate functions in the same coordinate system.
The image has three intersections on the left, three intersections on the right, plus the origin, for a total of 2
c makes separate functions in the same coordinate system.
The image of the observation:
Just starting instantly,;
Instantaneously in the middle;
The final stage is.
time, 3The c-axis of symmetry passes through the highest or lowest point and can be equal to.
II.1It is known to be the first.
The angles of the second and third quadrants, then.
The value range is as follows:
2.Function. The domain is defined as.
then function. The domain is defined as.
3.Function. The monotonically increasing interval is 4Establish.
If function. In monotonically increasing increments, then.
The value range is as follows:
5.Function. The domain is defined as.
Answer: 1When the function is decrementing, 4Cause.
is a function. The interval with the largest range of increasing intervals about origin symmetry, i.e., 5
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Anonymous users2024-02-06(1/1/2009 minus 1) (1/2008 minus 1......(1/3 minus 1) (1/2 minus 1).
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Anonymous users2024-02-05Solution: Original formula = (-2008 2009) * (2007 2008) *....1/2)
Because there are 2008 numbers in total, the result is positive).
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Anonymous users2024-02-04Tangerine x (8 + 16 + 32) x = 224
x=224/56
x=4 pears 4*2=8
Dragon fruit 8*2=16
x = 171 shirt time x
2+3*2+4*3)x=10x=
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Anonymous users2024-02-031.Let the unit price of oranges be x, then 8*(x+2x+4x)=224, and the solution is x=4, so oranges are 4 yuan, pears are 8 yuan, and dragon fruit is 16 yuan.
2。Let the wrong expenditure be x, then the actual expenditure is 10x, so 10x-x=, and the solution is x=, so the actual expenditure is 171 yuan.
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Anonymous users2024-02-02The unit price of orange x the unit price of pear 2x the unit price of dragon fruit is 4x8*x+8*2x+8*4x=224
x = 4 orange unit price 4 pear unit price 8 dragon fruit unit price 16 Wang accountant mistaken expenditure is actually x
x-x/10=
The time it takes to make 1 shirt, a pair of pants, and a coat is x 2x 3x2*x+3*2x+4*3x=10
x = then 14 shirts, 10 pairs of pants and 2 coats are required.
14* hours.
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Anonymous users2024-02-01Question 2, let the original amount be x, and it can be seen from the meaning of the question that Accountant Wang must have made it bigger. So he changed the number to 10x, which was 10x-x= x=
3 questions, the time taken for 1 shirt, a pair of pants, and a jacket is x, 2x, and 3x respectively.
From 2*x+3*2x+4*3x=10, x=1 2. 14*
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Anonymous users2024-01-311. Set the unit price of orange x, 8x+16x+32x 224, x 4, the unit price of pear 2x 8, and dragon fruit 4x 16
2. High actual x yuan, 10x-x, x
3. Set up 1 shirt for x hours, 2x+6x+12x 10,x, 14x+20x+6x 40x 20 hours.
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Anonymous users2024-01-30Is it perpendicular to the left side of p that is perpendicular to q?
An = three-quarters ab, bc = half ab, mn = one-half ab, so the result is three-quarters.
1.Solution: Let the speed of ship A x1, the speed of ship B x2, and the speed of water a. Downstream speed = ship speed + water speed, reverse water speed = boat speed - water speed, and the time to go down the water to a certain time at a uniform speed is t. >>>More
Question 1. Results: 100 19
Process: Assuming that A runs the time t first, then B and C have a speed of 95 t and 90 t respectively, and then B takes 5 (95 t) to reach the end point, and the distance C runs forward during this time is 5 (95 t) (90 t) = 19 90, then C is 10-19 90 = 100 90 from the end point >>>More
Question 2: If Xiao Ming wants to go out, the luggage he brings is 40cm long, 30cm wide and 60cm high, can a 70cm long umbrella be loaded with Li Xiang? >>>More
x^2-1=x^2-1^2=（x+1）（x-1）a^3-9a
a（a^2-9） >>>More