oneicyahdaley10
13.08.2020 •
Mathematics
1 - Os coeficientes numéricos de uma equação do 2º grau (ax² + bx + c = 0), são números reais representados pelas letras “a, b e c”. Para que uma equação do 2º grau possa existir, é necessário que o coeficiente “a” seja DIFERENTE de: * 1 ponto a) -2 b) -1 c) 0 d) 1 2) Usando o método de Tentativa e Erro, visto na aula, qual das alternativas abaixo representa uma raiz da equação: x²-5x+6=0 * 1 ponto a) x = 0 b) x = 1 c) x = 2 c) x = -2
Solved
Show answers
More tips
- F Food and Cooking How to Determine Healthy, Nutritious Food for Yourself?...
- S Style and Beauty How to Get Rid of a Bruise: Tips and Tricks...
- F Food and Cooking Лечо: вкусное и простое блюдо для любой кухни...
- H Health and Medicine Relieving Swelling in Legs: Causes and Ways to Alleviate the Symptom...
Answers on questions: Mathematics
- M Mathematics In a recent year, the average daily circulation of the wall street journal was 2,276,207. suppose the standard deviation is 70,940. assume the paper’s daily circulation is normally...
- M Mathematics Show and explain how replacing one equation by the sum of that equation and a multiple of the other produces a system with the same solutions as the one shown. 8x + 7y = 39 4x...
- M Mathematics Find the domain of the graphed function...
- M Mathematics Solve 2 2x+4 10 for x...
- C Chemistry Which is a polar molecule a. carbon tetrafluoride b. trifluoromethane c. tetrachloroethylene d. carbon tetrachloride e. ethylene...
- S Social Studies Critics of the view that regionalization will prevail over globalization base their argument on the belief that...
- M Mathematics Hey, can someone help me on this problem?...
- M Mathematics HELP PLSSS I BEG UUUU...
Ответ:
1) La opción correcta es;
c) 0
2) La opción correcta es;
c) x = 2
Step-by-step explanation:
1) La forma general de una ecuación cuadrática se puede escribir en la forma;
a · x² + b · x + c = 0
Dónde;
a, y b son los coeficientes de x², x y c es el término constante
Por tanto, para que exista un polinomio de 2º grado es necesario que el coeficiente a sea diferente de 0
De lo que tenemos;
(0) × x² + b · x + c = 0, lo que da;
(0) × x² + b · x + c = b · x + c = 0 que es una ecuación lineal o un polinomio de primer grado
Por tanto, la opción correcta es c) 0
2)
La ecuación dada se presenta como sigue;
f (x) = x² - 5 · x + 6 = 0
Usando el método de prueba y error, tenemos;
Cuando x = 0
f (0) = 0² - 5 · (0) + 6 = 6 que no es igual a 0 y, por lo tanto, no es una solución
Cuando x = 1
f (1) = (1) ² - 5 · (1) + 6 = 1 que no es igual a 0 y por lo tanto, no es una solución
Cuando x = 2
f (2) = (2) ² - 5 · (2) + 6 = 0 que es igual a 0 y por lo tanto, es una solución
Cuando x = -2
f (1) = (-2) ² - 5 × (-2) + 6 = 20 que no es igual a 0 y por lo tanto, no es una solución
Por tanto, la opción correcta es c) x = 2
Ответ:
We are trying to find the height of each hay bale right? So we need to divide the volume by the length and the width... so:
H = (10 2/3ft^3) diveded by (1 1/3ft x 4ft)
H = 2 ft
There are 8 bales of hay mate, so we have to multipy that by the H... so 2x8= 16ft.
Hope this helped!