7 / X squared + X + 1 / X squared - x = 6 / X squared - 1

7 / X squared + X + 1 / X squared - x = 6 / X squared - 1

7 / X squared + X + 1 / X squared - x = 6 / X squared - 1
7 / X (x + 1) + 1 / X (x-1) = 6 / (x + 1) (x-1) multiplied by X (x + 1) (x-1)
7(x-1)+(x+1)=6x
7x-7+x+1=6x
8x-6=6x
8x-6x=6
2x=6
x=3
If you don't understand this question, you can ask,

1-x △ (the square of 1 + X + x) + 6 △ (1-x) = 7 △ (1-x)
Fractional equation ~ ~ ~ to step ha

1-x/(1+x+x²)+6/(1-x)=7/(1-x)
1-x/(1+x+x²)=1/(1-x)
Multiply both sides by (1-x) (1 + X + X & sup2;)
1-x³-x(1-x)=1+x+x²
x³+2x=0
x(x²+2)=0
x=0

2x square-9x + 8 = 0

2x square-9x + 8 = 0
x=[9±√(9²-4×2×8)]/(2×2)=(9±√17)/4
So x = (9 + √ 17) / 4 or x = (9 - √ 17) / 4

23 + 19 * 25-28 what is the last step of multiplication

（23+19）*（25-28）

If the equation ax-2y = x + 3 is a quadratic equation of two variables with respect to XY, then the value range of a is

ax-2y=x+3
ax-x-2y=3
(a-1)x-2y=3
∴a-1≠0
a≠1

There are two classes participating in tree planting work. They are divided into a batch of saplings. The number of saplings in the first class is more than 30% of the total, and the number of saplings in the second class is less than 60%?

According to the meaning of the question, (30% x + 100) + (60% X-60) = x30% x + 100 + 60% X-60 = X90% x + 100-60 = X90% x + 40 = xx-90% x = 4010% x = 40x = 40 △ 10% x = 4

Given the function f (x) = log2 (| x + 1 | + | X-2 | - M). (1) when m = 5, find the domain of definition of function f (x); (2) if the solution set of inequality f (x) ≥ 1 about X is r, find the range of value of M

(1) Let m = 5: | x + 1 | + | X-2 | > 5, the solution set of the inequality is the union of the solution sets of the following three inequality systems: X ≥ 2x + 1 + X − 2 > 5, or 1 ≤ x ＜ 2x + 1 − x + 2 > 5, or X ＜ 1 − x − 1 − x + 2 > 5, the domain of definition of the function f (x) is (- ∞, - 2) ∪ (3, + ∞); (2) No

A kind of beverage in the supermarket is being promoted. One free bottle is bought for every two bottles. The price of each bottle is 2.4 yuan. How much is the actual price of each bottle?

2.4 + 2.4 equals 4.8 4.8/3 equals 1.6

New concept English 2A Lesson 13 kalanjin text

Take a look at the records of international running events in the last fifty years.Before 1980,the winners of distance races were usually from North America and Europe.There were some winners from oth...

From city a to city B, it takes five hours for trucks and six hours for buses. The simplest ratio of the speed of trucks to that of buses is ()
1. 312 tons = () tons () kg 70 minutes = () hours. 2, (): () = 40 () = 80% = () 40 3, () tons are 13 of 30 tons, 50 meters more than 40 meters (). 4, class 6 (1) has 48 people on duty today, and 2 people ask for leave due to illness. What's the attendance rate of class 6 (1) today?

From city a to city B, it takes five hours for trucks and six hours for buses. The simplest ratio of the speed of trucks to that of buses is (6:5)
1. 12 tons = (3) tons (120) kg, 70 minutes = (1 and 1 / 6) hours
2、（4 ）∶（5 ）=40/(50 ) =80%=（32 ）÷40
3. (3.9) tons is 13% of 30 tons, and 50 meters is more than 40 meters
4. There are 48 students in class 6 (1) today, and 2 of them ask for leave because of illness. What's the attendance rate of class 6 (1) today? 96%