# Secret number

Determine the secret number n, which reversed decrease by 16.4 if the number increase by 16.4.

Result

n1 =  0.06
n2 =  -16.46

#### Solution:

$n_1 = \dfrac{ -16.4+ \sqrt{ 16.4^2+4 }}{2} = 0.06$
$n_2 = \dfrac{ -16.4- \sqrt{ 16.4^2+4 }}{2} = -16.46$

Our examples were largely sent or created by pupils and students themselves. Therefore, we would be pleased if you could send us any errors you found, spelling mistakes, or rephasing the example. Thank you!

Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Be the first to comment!

Tips to related online calculators
Looking for help with calculating roots of a quadratic equation?
Do you have a linear equation or system of equations and looking for its solution? Or do you have quadratic equation?

## Next similar math problems:

1. Walnuts
x walnuts were in the mission. Dano took 1/4 of nuts Michael took 1/8 from the rest and John took 34 nuts. It stayed here 29 nuts. Determine the original number of nuts.
2. Unknown number
Identify unknown number which 1/5 is 40 greater than one tenth of that number.
3. The product
The product of a number plus that number and its inverse is two and one-half. What is the inverse of this number
4. Equation
Solve the equation: 1/2-2/8 = 1/10; Write the result as a decimal number.
5. Theorem prove
We want to prove the sentence: If the natural number n is divisible by six, then n is divisible by three. From what assumption we started?
6. Fifth of the number
The fifth of the number is by 24 less than that number. What is the number?
7. Equation
Equation ? has one root x1 = 8. Determine the coefficient b and the second root x2.
8. Discriminant
Determine the discriminant of the equation: ?
9. Roots
Determine the quadratic equation absolute coefficient q, that the equation has a real double root and the root x calculate: ?
10. Apples 2
How many apples were originally on the tree, if the first day fell one third, the second day quarter of the rest and on tree remained 45 apples?
11. Factory
In the factory workers work in three shifts. In the first inning operates half of all employees in the second inning and a third in the third inning 200 employees. How many employees work at the factory?
12. Variable
Find variable P: PP plus P x P plus P = 160
13. Fraction
For what x expression ? equals zero?
14. Solve 3
Solve quadratic equation: (6n+1) (4n-1) = 3n2
15. Mom and daughter
Mother is 39 years old. Her daughter is 15 years. For many years will mother be four times older than the daughter?
16. Simple equation
Solve for x: 3(x + 2) = x - 18
17. Candy
Peter had a sachet of candy. He wanted to share with his friends. If he gave them 30 candies, he would have 62 candies. If he gave them 40 candies, he would miss 8 candies. How many friends did Peter have?