Question

When solving a problem, two students fell back on a 2nd degree equation, however, when solving it, they both made a mistake. The 1st student only got the independent term of the equation wrong, finding the roots -10 and -2. The 2nd student only got the coefficient of the 1st degree term wrong, finding roots 4 and 8. Were the correct roots of the equation?

236

likes
1182 views

Answer to a math question When solving a problem, two students fell back on a 2nd degree equation, however, when solving it, they both made a mistake. The 1st student only got the independent term of the equation wrong, finding the roots -10 and -2. The 2nd student only got the coefficient of the 1st degree term wrong, finding roots 4 and 8. Were the correct roots of the equation?

Expert avatar
Santino
4.5
112 Answers
Com certeza, vamos descobrir as raízes corretas da equação quadrática! Veja como podemos abordar isso: **Compreendendo as informações** * **Aluno 1:** Errou no termo constante (termo independente). Suas raízes são -10 e -2. * **Aluno 2:** Errou no coeficiente do termo x. Suas raízes são 4 e 8. **Usando as propriedades das raízes** 1. **Soma das Raízes:** Em uma equação quadrática *ax² + bx + c = 0*, a soma das raízes é igual a *-b/a*. 2. **Produto das Raízes:** Em uma equação quadrática *ax² + bx + c = 0*, o produto das raízes é igual a *c/a*. **Vamos analisar:** * **Aluno 1:** * Produto de suas raízes: (-10) * (-2) = 20. Este pode ser o *c/a* correto. * **Aluno 2:** * Soma de suas raízes: 4 + 8 = 12. Este poderia ser o *-b/a* correto. **Encontrando a equação correta:** Vamos supor que a equação quadrática correta seja *x² + bx + c = 0*. (Definiremos a = 1 para simplificar). * Do Aluno 2, temos -b/1 = 12, então b = -12 * Do Aluno 1, temos c/1 = 20, então c = 20 **A equação correta:** x² - 12x + 20 = 0 **Encontrando as raízes corretas** Podemos resolver esta equação quadrática usando fatoração ou a fórmula quadrática: (x - 10) (x - 2) = 0 Portanto, as raízes corretas são x = 10 e x = 2. **Conclusão:** As raízes corretas da equação eram 10 e 2.

Frequently asked questions (FAQs)
What is the standard deviation of a dataset containing 10 numbers: 5, 7, 8, 4, 6, 9, 10, 3, 2, 1?
+
Question: What is the measure of angle CBO in a circle with center O, radius OB, and chord BC that divides OB in the ratio 2:3?
+
What is the median of a set of numbers: 14, 20, 27, 35, 39, 41?
+
New questions in Mathematics
Use the digits of 1,9,2,3 to come up with all the numbers 98 and 95
Calculate the 6th term of PA whose 1st term is 6.5 and the ratio 5
Use the elimination to find the solution to each linear system. X+y=43 2x-y=20
(5-(4-3)*3)-(8+5))
What is the r.p.m. required to drill a 13/16" hole in mild steel if the cutting speed is 100 feet per minute?
Sean must chose a 6- digit PIN number for his online banking account.Each digit can be chosen from 0 to 9. How many different possible PIN numbers can sean chose.
To celebrate the five-year anniversary of a consultancy specializing in information technology, the administrator decided to draw 3 different qualification courses among its 10 employees. Considering that the same employee cannot be drawn more than once, the total number of different ways of drawing among employees is:
By direct proof, how can you prove that “The sum of any three consecutive even integers is always a multiple of 6”.
. What will be the osmotic pressure of a solution that was prepared at 91°F by dissolving 534 grams of aluminum hydroxide in enough water to generate 2.784 ml of solution.
A triangular window has a base of 6 ft. and a height of 7 ft. What is its area?
If X1 and X2 are independent standard normal variables, find P(X1^2 + X2^2 > 2.41)
0.1x8.2
X³-27
Calculate the change in internal energy of a gas that receives 16000 J of heat at constant pressure (1.3 atm) expanding from 0.100 m3 to 0.200 m3. Question 1Answer to. 7050J b. 2125J c. None of the above d. 2828J and. 10295 J
A block slides across the floor with a force of 20N, which has an angle of 30°. The mass of the block is 2kg and the coefficient of friction is 0.1. Calculate the value of all the forces involved in this system and finally the value of the acceleration.
Gender and communication : Answer the question ( 1 paragraph is ok) . Please can you write about women? Compared to your other identities, how much of a role does gender play in your life? And has your own sex/gender offered you privileges or disadvantages? How so?
Beren spent 60% of the money in her piggy bank, and Ceren spent 7% of the money in her piggy bank to buy a joint gift for Deren, totaling 90 TL. In the end, it was observed that the remaining amounts in Ceren and Beren's piggy banks were equal. Therefore, what was the total amount of money that Beren and Ceren had initially? A) 120 B) 130 C) 150 D) 160 E) 180
Hola👋🏻 Toca en "Crear Nueva Tarea" para enviar tu problema de matemáticas. ¡Uno de nuestros expertos comenzará a trabajar en ello de inmediato!
Solve the system of equations by the addition method. 0.01x-0.08y=-0.1 0.2x+0.6y=0.2
(3.1x10^3g^2)/(4.56x10^2g)