What inequality is the square of x-2x-3 > 0 and how to solve the set

What inequality is the square of x-2x-3 > 0 and how to solve the set

Quadratic inequality of one variable. X > 3 or X

Given f (x) 2x square + BX + C. the solution set of inequality f (x) less than 0 is an analytic expression of (0,5) finding. F (x)

F (x) = 2x & # 178; + BX + C, the solution set is (0,5)
It is shown that (0,5) is the root of F (x) = 0
Substituting x = 0, x = 5 into f (x) = 0
We get f (0) = C = 0, f (5) = 50 + 5B + C = 0
The solution is C = 0, B = - 10
Therefore, f (x) = 2x & # 178; + BX + C = 2x & # 178; - 10x

What is the solution set of the square of inequality 2x - | x | - 1 ＜ 0?

-1

6. - 3,1,9 make the result equal to 24

9÷≮－＜－3＋1＞≯＋6

Given that real numbers a and B are opposite to each other, C and D are reciprocal to each other, the absolute value of X is √ 81, find the value of algebraic formula (a + B + CD) x + √ (a + b) - cubic √ CD
Make the process clear

A + B = 0cd = 1x = 9 or - 9 so: original = (0 + 1) x + √ 0 - &#, 179; √ 1 = x + 0-1 = X-1 when x = 9, original = 9-1 = 8 when x = - 9, original = - 9-1 = - 10. I'm glad to answer for you. I wish you progress in your study! I'll always answer for you at 523 ~ ~ if you agree with my answer, please click [select as satisfied

Li Hong read a story book. On the first day, she read 25% of the whole book. On the second day, she read 25 pages. There are 65 pages left. How many pages are there in this book?

Let x pages be 25% x + 25 + 65 = x = 120

The length of each side of a triangle is the root of the equation x * 2 -- 6x + 8 = 0. What is the circumference of the triangle?

x²-6x+8=0
The solution is x = 2, x = 4
If the three sides of the triangle are 2, 2, 4, respectively
So it's only two, four, four
The perimeter is 10

The passenger car and the freight car leave from a and B at the same time. The passenger car runs the whole journey in 8 hours and the freight car runs the whole journey in 12 hours. The distance between the two cars' meeting point and the midpoint is 96 km

Set the whole distance x km
X/(1+8/12)-X/2=96
X = 960km
A: Yes

If a is a rational number, compare the size of a with that of a tenth

When a > 0, a > 1 / 10A
When a = 0, a = 1 / 10A
When a < 0, a < 1 / 10A

On the morning of September 25, 2012, China's first aircraft carrier "Liaoning" was officially handed over and listed. The J-15 fighter is the first fighter of "Liaoning" to reach its capacity. It is known that the acceleration of the J-15 fighter when accelerating on the runway is 4.5m/s2, and the take-off speed is 50m / s. the runway length of "Liaoning" aircraft carrier is 100m, How many meters is the runway at least; (2) if the aircraft carrier "Liaoning" is stationary and the J-15 fighter plane taxis on the aircraft carrier for 100m to take off, what initial speed must the ejection system make the aircraft have; (3) if the aircraft carrier "Liaoning" advances at 10m / S and the J-15 fighter plane taxis on the aircraft carrier for 100m to take off, the aircraft gains from the ejection system What's the speed of the game

(1) From V2 = 2aX: x = v22a = 5022 × 4.5m ≈ 278m (2)) according to v2-v02 = 2aX, & nbsp; V0 = V2 − 2aX ′ = 502 − 2 × 4.5 × 100M / S = 40m / S (3) the velocity of the aircraft from the ejection system is V0 ′, then there are: & nbsp; & nbsp; (V-V aircraft carrier) 2-v0 ′ 2 = 2aX ′ is substituted into (50-10) 2-v0 ′ 2 = 2 × 4.5 × 100, and the solution is: V0 ′ = 26.5m/s A: (1) the runway of the J-15 fighter plane should be at least 278m when it takes off from a standstill on land. (2) the initial velocity of the aircraft must be 40m / s by the ejection system. (3) the velocity of the aircraft from the ejection system is 26.5m/s