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)
Math question: Simplify the expression 3(x + 5) - 2(2x - 3) using the distributive property.
+
What is the volume of a cone with a radius of 4 units and a height of 6 units?
+
What are the solutions for the cubic equation x^3 + 2x^2 - 4x + 3 = 0?
+
New questions in Mathematics
In a random sample of 600 families in the Metropolitan Region that have cable television service, it is found that 460 are subscribed to the Soccer Channel (CDF). How large a sample is required to be if we want to be 95% confident that the estimate of “p” is within 0.03?
What payment 7 months from now would be equivalent in value to a $3,300 payment due 23 months from now? The value of money is 2.7% simple interest. Round your answer to 2 decimal places. Show all work and how you arrive at the answer..
solve the following trigo equation for 0°<= x <= 360°. sec x =-2
(2x+5)^3+(x-3)(x+3)
A company that manufactures personal hygiene items purchases machinery for $220,000 that is considered to last 7 years; it is estimated that at the end of the period it will have a salvage value of $1000. Find: to. The depreciation rate. b. The book value at the end of the sixth year.
∫ √9x + 1 dx
Estimate the quotient for 3.24 ÷ 82
TEST 123123+1236ttttt
4+168×10³×d1+36×10³×d2=-12 -10+36×10³×d1+72×10³×d2=0
In a physics degree course, there is an average dropout of 17 students in the first semester. What is the probability that the number of dropouts in the first semester in a randomly selected year has between 13 and 16 students?
2x2
9/14 x 7/27 carry out indicated operation
Let G be the center of gravity of triangle ABC. We draw through A a parallel to BC on which we take a point D so that DG⊥BG. If the area of the quadrilateral AGBD is equal to s, show that AC·BD≥2·s.
To paint a 250 m wall, a number of workers were employed. If the wall were 30 m longer, 9 more workers would be needed. How many were employed at the beginning?
simplify w+[6+(-5)]
4m - 3t + 7 = 16
A candy manufacturer must monitor deviations in the amount of sugar in their products They want their products to meet standards. They selected a random sample of 20 candies and found that the sandard deviation of that sample is 1.7. What is the probabilty of finding a sample variance as high or higher if the population variance is actually 3277 Assume the population distribution is normal.
In a school playground When going out for recess, 80 men and 75 women coexist, the Patio measures 10 meters For 40 meters (what will be the population density in the break
Hola👋🏻 Toca en "Crear Nueva Tarea" para enviar tu problema de matemáticas. ¡Uno de nuestros expertos comenzará a trabajar en ello de inmediato!
An export company grants a bonus of $100,000 pesos to distribute among three of its best employees, so that the first receives double the second and the latter receives triple the third. How much did each person receive?