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)
Find the equation of an ellipse with center (h, k) = (-2, 3), major axis length = 10, and minor axis length = 6.
+
What is the value of f(10) for the logarithmic function f(x) = log(x) / ln(x)?
+
What is the derivative of sin(2x) + 3cos(5x) - tan(4x) - sec(3x)?
+
New questions in Mathematics
Solution to the equation y'' - y' - 6y = 0
Exercise 4 - the line (AC) is perpendicular to the line (AB) - the line (EB) is perpendicular to the line (AB) - the lines (AE) and (BC) intersect at D - AC = 2.4 cm; BD = 2.5 cm: DC = 1.5 cm Determine the area of triangle ABE.
Using the integration by parts method, calculate the integral of [x².ln(1/x)]dx: x 4 /4 x³/6 x 4 /8 x³/3 x 4 /6
The equation of the circle that passes through (5,3) and is tangent to the abscissa axis at x=2 is a.(x-2)^2 (y 3)^2 = 9 b.(x-2)^2 (y-3)^2 = 9 c.(x-2)^2 (y-3)^2 = 4 d.(x-2)^2 (y 1)^2 = 4 e.(x-2)^2 (y-1)^2 = 4
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.
If the midpoint of point A on the x=3 line and point B on the y=-2 line is C(-2,0), what is the sum of the ordinate of point A and the abscissa of point B?
41/39 - 1/38
A warehouse employs 23 workers on first​ shift, 19 workers on second​ shift, and 12 workers on third shift. Eight workers are chosen at random to be interviewed about the work environment. Find the probability of choosing exactly five first ​-shift workers.
28 is 92 percent of what?
Given (3x+2)E [2;14] how much money (in soles) does Sophia have if numerically it is the greatest value of x?
TEST 123123+1236ttttt
Two minus log 3X equals log (X over 12)
The population of Pittsburgh, Pennsylvania, fell from 520,117 in 1970 to 305,704 in 2010. Write an exponential function P(t) modeling the population t years after 1970. Round the growth factor to the nearest tem thousandth.
Solve equations by equalization method X-8=-2y 2x+y=7
A cell phone company offers two calling plans. Plan A: $20 per month plus 5 cents for each minute, or Plan B: $30 per month plus 3 cents for each minute. [2] Write an equation to describe the monthly cost (a) C (in $) in terms of the time m (in minutes) of phone calls when Plan A is applied.
factor the polynomial completely over the set of complex numbers b(x)=x^4-2x^3-17x^2+4x+30
Consider mixing 150 ml, 0.1M, HCI with 100 ml, 0.2M, KOH solution. Determine the pH of final solution.
the product of a 2-digit number and a 3-digit number is about 50000, what are these numbers
Determine the general solution of the equation y′+y=e−x .
8(x+4) -4=4x-1