The solution of the equation about X is x-2x + 1-k (kx-1) = 0

The solution of the equation about X is x-2x + 1-k (kx-1) = 0

First decompose the factor → X & # 178; - 2x-k & # 178; X + K + 1 = 0
Merge the same term → X & # 178; - (K & # 178; + 2) x + (K + 1) = 0
Cross multiplication → [x - (K & # 178; + 1)] (x-1) = 0
We get: X1 = K & # 178; + 1
x2=1

The solution of the equation of 2x power 3x-7 = 0
Do a quick answer in ten minutes. Do 2x ^ + 3x-7 = 0

2x²+3x-7=0
（x+3/4）²=65/16
x= (-3±√65)/4

Let's help solve an equation
In the two real roots of x ^ + 2 (m-2) x + m ^ + 4 = 0, the square of the sum of the two roots is larger than the product of the two roots by 24, and the value of M is obtained

Let two be ab a + B = - 2 (m-2) AB = m ^ + 4 (a + b) (a + b) - 2Ab = 24, then (- 2 (m-2)) (- 2 (m-2)) - 2 (m ^ + 4) = 24, but you didn't give M's own solution

A group of 100 small light bulbs connected in series are connected under the voltage of 220 v
The voltage at both ends of each small bulb is v. if the power of each small bulb is 0.5 W, the current passing through each small bulb is a

The voltage at both ends of each small bulb is 220 / 100 = 2.2 v
If the power of each small bulb is 0.5 W, the current through each small bulb is 0.5 / 2.2 = 0.227 a

It is known that the calculation result of (x + 1) (x 2 + m x + n) does not contain x 2 and X terms, and the values of M and N are obtained

(x + 1) (x2 + MX + n) = X3 + (M + 1) x2 + (M + n) x + N, from the meaning of the title: M + 1 = 0, M + n = 0, the solution: M = - 1, n = 1

The number of one student's home appliance meter is 6229.5
A classmate's home appliance energy meter shows 6229.5. Now he has four 40 W electric lamps in his home. He uses 2.5 hours of electricity on average every day for 30 days. How many kilowatt hours does he share? What is the meter's indication at this time?

40W * 4 * 2.5 = 400W / h, i.e. 0.4 kwh per day
0.4 degrees * 30 days = 12 degrees
The final degree should be 6241.5 degrees (but only electric light? No refrigerator, water dispenser, bathtub, etc.)?

Given: F (x) = ax ^ 2 - √ 2, a > 0, if f (f (2)) = - √ 2, find a

F (2) = 4A - √ 2
f(f(2))=f(4a-√2)=a(4a-√2)^2-√2
So a (4a - √ 2) ^ 2 - √ 2 = - √ 2
That is, a (4a - √ 2) ^ 2 = 0
Because a > 0
So 4A - √ 2 = 0, a = (√ 2) / 4

100 watt bulb, use for 10 hours, the meter shows several kilowatts

Your question is very simple. Baidu knows that it is very happy to help you solve your problem
Calculation method: 100 * 10 = 1000 watts per hour = 1 kWh
The meter shows 1 kilowatt hour
Baidu knows that it will always give you the most professional answer

Factorization: 1.2a-178; - 4a-2x-178; - 25-2x-178; - 12x + 18

2a（a－2）
（x－5）（x+5）
2（x-3）²

In the oxide of a metal element R, the mass ratio of R to oxygen is 9:8, and the known atomic weight of R is 27
It's better to have a process^^

Let the chemical formula be rxoy
So 27x / 16y = 9 / 8
x:y=2:3
So the chemical formula is r2o3