Solve the quadratic equation of one variable with the square of (2x-5) = 9 All roads are connected together

Solve the quadratic equation of one variable with the square of (2x-5) = 9 All roads are connected together

Square first 2x-5 = 3 or 2x-5 = - 3
X = 4 or x = 1

To solve the equation, 6x of 7 = 3 of 14, 5 of 12 △ x = 5 of 8, 2x of 9 = 8 of 21, X of 15 = 3 of 4

6 out of 7 x = 3 out of 14
x=3/14÷6/7
x=1/4
5 / 12 △ x = 5 / 8
x=5/12÷5/8
x=2/3
2X of 9 = 8 of 21
x=8/21÷2/9
x=12/7
X △ 8 / 15 = 3 / 4
x=3/4x8/15
x=2/5
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It is known that A1 is equal to - 1 / 3, A2 is the reciprocal of difference of A1, A3 is the reciprocal of difference of A2 How much is A2009?
If a number is known to be a, then the reciprocal difference of a is 1 / (1-A)

a2=1/(1-a1)=1/(1+1/3)=3/4
a3=1/(1-a2)=1/(1-3/4)=4
a4=1/(1-a3)=1/(1-4)=-1/3=a1
So A5 = A2
a6=a3
a7=a4=a1
So this is a cycle of three
The remainder of 2009 / 3 is 2
So A2009 = A2 = 3 / 4

48 = 14x + X, what is x equal to

3.2

A set of all points on the x-axis in a rectangular plane coordinate system

M={X|X=Kπ,k∈Z}

1. Known: algebraic formula (x-1) (x + 2) (x-3) (X-6) + m, when m takes what value, the above formula is the complete square formula
It is known that the algebraic formula (x-1) (x + 2) (x-3) (X-6) + m is a complete square when m is taken
A = 2011, B = 2007, find a square - 2Ab + b square - 10A + 10B + 25

The estimated algebraic formula is: (x-1) (x + 2) + (x-3) (X-6) + m (x-1) (x + 2) + (x-3) (X-6) + M = x & # 178; + X-2 + X & # 178; - 9x + 18 + M = 2x & # 178; - 8x + 16 + M = 2 (X & # 178; - 4x) + 16 + M = 2 (X-2) &# 178; + 8 + m is a complete square formula, then: 8 + M = 0m = - 8A & # 178; - 2Ab + B & # 178; - 10A + 10B

Given △ ABC three vertices a (1,5) B (- 2, - 4) C (6,0), find the linear equation where the median line parallel to BC is located

A:
A（1,5）,B（-2,-4）,C（6,0）
The slope of BC line k = (- 4-0) / (- 2-6) = 1 / 2
So: the slope of the median line of parallel BC is k = 1 / 2
The midpoint of AB is (- 1 / 2,1 / 2)
So: the median equation is Y-1 / 2 = (1 / 2) * (x + 1 / 2)
So: y = x / 2 + 1 / 4 + 1 / 2
So: y = x / 2 + 3 / 4

The second power of (- 2) × the third power of (- 2) = ()

=2012 + 2013 power of (- 2)
=4025 power of (- 2)
=-4025 power of 2

If the electric energy meter in the home is marked with the words of 220V, 5A and 2500r / kWh, the maximum power of the electric appliance in the home is 0___ tile
If you have 5 60 watt electric lights, a 70 watt TV set and a 250 Watt washing machine in your home, you can still use the most electric appliances_____ When the turntable of this watt hour meter turns 5000 times, it consumes electricity_____ degree

The maximum power that can connect electrical appliances at home is_ 1100__ tile
P=UI=220V*5A=1100W
The maximum power of the electrical appliances that can be used is___ 480__ Tile,
1100-60*5-70-250=480
When the turntable of this watt hour meter turns 5000 times, it consumes electricity__ 2___ degree
5000/2500=2kwh

Let a = {x | x ^ 2-3x + 2 = 0} B = {x | x ^ 2-ax + 2 = 0} if a ∪ B = a, find the set of all a values

{3}