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2.Apple: 60Pear: 120The third type: 180
3.It is about 678 yuan.
5.West; 360.Yellow; 432.Earth; 108.
7.Approximately.
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1, 60 * 100 * 12 = 72000cm = 720m2, set three kinds of trees for a total of x.
1|3x +1|6x =180
x=360 pear tree 1|3x=120 apple trees: 180-120=60 trees, 360-180=180 trees.
3,300*60%* Let's do the math for yourself.
4, (squared * = the result is your own calculation.
I don't know if you still want to, just in case you need to talk about it halfway first, I'll continue.
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Rice. 2.Apple: 60 trees. Pears: 120 pears. The third type: 180 trees.
3.It is about 678 yuan.
5.West; 360.Yellow; 432.Earth; 108.
7.Approximately hours.
Person. Be sure to remember to add units, and answer.
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60* There are x trees in total.
x/6+x/3=180
Solution: x=360
300*40%*RMB.
Square metre.
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Find the radius first. Then find the wheel axle length, then 100, find out how many meters you walk in a minute, and then 12
56m divided by 10, divided by 2, after finding the radius, find the area.
2 5 Find tomatoes, (900-tomato area) (4+1)*4: cucumber, (900-tomato area) (4+1)*1: sweet potato.
2.Apple: 60Pear: 120The third type: 180
3.It is about 678 yuan.
5.West; 360.Yellow; 432.Earth; 108.
7.Approximately.
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It takes 30 seconds to watch a butanci, and 60 times is 1800 seconds.
30*60=1800 seconds).
However, after the unit conversion of burning, 1800 seconds is 30 minutes.
Section: Tong 1800 60 = 30 minutes).
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Solution: This question examines the sine theorem and the cosine theorem.
Hope.
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2.Merge the left side of the equal sign into x 2-
3=x-2 and then turns into x 2-x-1=0
The constant term is -1 first, and c is chosen
3.According to the two roots of the binary linear equation, x1*x2=c a=(a 2-1) (a-1)=a+1
He said that there is a root of 0, so x1*x2=a+1=then observe the problem, when a=1, this equation becomes a univariate equation x=0, so choose c
4.Numbers that are opposite to each other are 4x 2-
2x-5=-(2x^2+1)
Then move the term 6x 2-2x-4=0
Approximately 3 x 2-x-2 = 0
It is then factored using the cross multiplication method.
3x+2)(x-1)=0
Answer: Choose b, the figure below, and the question can be directly broken down by a completely square formula, if x+2 is considered a.
It becomes a 2-10a+25=0.
Directly with the perfect square formula (a-5) 2=0
Then it's a=5.
Then substitute a=x+2.
x+2=5x=3
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Question 4: They are the opposite of each other.
Their sum is zero, and the equation can be solved.
x+2-5=0, i.e. x=3
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4. Opposite to each other, it is and.
02x^2+1+4x^2-2x-5=0
6x^2-2x-4=0
3x^2-x-2=0
Then use the cross multiplication.
x-1)(3x+2)=0
x=1 or. x=-2/3
3. Let x+2=m
The original formula becomes.
m^2-10m+25=0
m-5)^2=0
m-5=0m=5, that is.
x+2=5x=3
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(1) It will be expressed in degrees, minutes, and seconds °+4312〃==3 °43′.12〃
2) 52°13 48 52°13 48 = 52° (3) 31°56 3 = 10° 38 40 (4) (5) in degrees
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3 degrees, 43 minutes, 12 seconds.
10 degrees 20 minutes and seconds.
3 degrees 59 minutes 36 seconds.
67 degrees, 30 minutes, 0 seconds.
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It's good to use a calculator, it's really fun for children. Note that each unit is converted to 60.
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The guy above has been solved, there's no need to do it again :)
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a b-b a-(a 2 + b 2) ab divides it into (a 2-b 2-a 2-b 2) ab and then simplifies it to -2b a
Because (a+b) 2=a 2+2ab+b 2, ab=[(a+b) 2-a 2-b 2] 2 is substituted into 3a 2+ab-2b 2=0 to obtain: 3a 2+[(a+b) 2-a 2-b 2] 2-2b 2=0
So [6a 2+(a+b) 2-a 2-b 2-4b 2] 2=0 so 6a 2+(a+b) 2-a 2-b 2-4b 2=0 so 5a 2-5b 2+(a+b) 2=0 so 5(a 2-b 2)+(a+b) 2=0 so 5(a+b)(a-b)+(a+b) 2=0 Situation: 1When a+b is not equal to 0, the formula divides a+b at the same time to obtain 5(a-b)+(a+b)=0
Deparentheses: 6a-4b=0
So b=3a2
So b a=3 2
So -2b a = -3
2.When the bend is a+b=0, there is a=-b
So -2b a=2
To sum up: a b-b a-(a 2 + b 2) ab has a value of -3 or 2a
bcab-bc-ac=1/2(2ab2c
2ab-2bc-2ac)1/2(a
b2ab+b
c2bc+ac
2ac)1/2[(a-b)
b-c)a-c)
Substitute ABC for obtain.
Original = 1 2 [1
x=( Zheng Zhi 5-1) 2
2x+1=√5
Square on both sides. 4x^2+4x+1=5
4x^2+4x=4
x^2+x=1
x^4+x^2+2x-1
x^4+x^3-x^3+x^2+2x-1
x^2(x^2+x)-x^3+x^2+2x-1x^2×1-x^3+x^2+2x-1
x^3+2x^2+2x-1
x^3-x^2+3x^2+2x-1
x(x^2+x)+3x^2+2x-1
x×1+3x^2+2x-1
3x^2+x-1
3x^2+3x-2x-1
3(x^2+x)-2x-1
3×1-2x-1-2x+2
4,(x-1)(x-2)(x-3)(x-4)[(x-1)(x-4)][x-2)(x-3)](x^2-5x+4)(x^2-5x+6)
x^2-5x)^2+10(x^2-5x)+24x^4-10x^3+25x^2+10x^2-50x+24x^4-10x^3+35x^2-50x+24
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2x+y+6≥6+2√2xy
xy≥6+2√2xy
xy-√2)^2≥8
xy-2 2 2 or xy-2 -2 2 (impossible) so the xy minimum is (3 2) 2=18
--Please see the following standard answer:
Solution: Using the fundamental inequality a+b 2 (ab), so that a=2x, b=y, then there is xy=2x+y+6 2 (2xy)+6, so that xy=t, we get t -2 2) t-6 0
That is, (t-3 2)(t+ 2) 0 can be solved: t 2, t 32 and t 0 is noted, so the solution t 3 2, so xy 18
So the answer should be 18
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Set up the production of travel pencils x branches, ballpoint pens y y branches, fountain pens z branches, from the title of the meaning, because the number of large eggplants after production is the same, so x=y=z
x+y+z=1250000
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