Question

Associate each 2nd degree equation with its respective roots. A) x2+6x+8=0 B)x2-5x-6=0

267

likes
1333 views

Answer to a math question Associate each 2nd degree equation with its respective roots. A) x2+6x+8=0 B)x2-5x-6=0

Expert avatar
Frederik
4.6
101 Answers
Para associar as equações do 2º grau às suas respectivas raízes, podemos utilizar a fórmula quadrática. A fórmula quadrática é dada por:

x = \frac{{-b \pm \sqrt{{b^2 - 4ac}}}}{{2a}}

Onde "a", "b" e "c" são os coeficientes da equação quadrática ax^2 + bx + c = 0.

A) Vamos começar com a equação x^2 + 6x + 8 = 0.

Comparando com a forma geral ax^2 + bx + c = 0, temos:
a = 1, b = 6 e c = 8.

Aplicando a fórmula quadrática, temos:

x = \frac{{-b \pm \sqrt{{b^2 - 4ac}}}}{{2a}} = \frac{{-6 \pm \sqrt{{6^2 - 4 \cdot 1 \cdot 8}}}}{{2 \cdot 1}}

Resolvendo a expressão dentro da raiz, obtemos:

x = \frac{{-6 \pm \sqrt{{36 - 32}}}}{{2}} = \frac{{-6 \pm \sqrt{{4}}}}{{2}} = \frac{{-6 \pm 2}}{{2}} = -3 \pm 1

Portanto, as raízes da equação x^2 + 6x + 8 = 0 são x = -3 + 1 = -2 e x = -3 - 1 = -4.

Portanto, a resposta para a equação A é (-2, -4).

B) Agora vamos resolver a equação x^2 - 5x - 6 = 0.

Comparando com a forma geral ax^2 + bx + c = 0, temos:
a = 1, b = -5 e c = -6.

Aplicando a fórmula quadrática, temos:

x = \frac{{-b \pm \sqrt{{b^2 - 4ac}}}}{{2a}} = \frac{{-(-5) \pm \sqrt{{(-5)^2 - 4 \cdot 1 \cdot (-6)}}}}{{2 \cdot 1}}

Resolvendo a expressão dentro da raiz, obtemos:

x = \frac{{5 \pm \sqrt{{25 + 24}}}}{{2}} = \frac{{5 \pm \sqrt{{49}}}}{{2}} = \frac{{5 \pm 7}}{{2}}

Portanto, as raízes da equação x^2 - 5x - 6 = 0 são x = \frac{{5 + 7}}{{2}} = 6 e x = \frac{{5 - 7}}{{2}} = -1.

Portanto, a resposta para a equação B é (6, -1).

Respostas:
A) (-2, -4)
B) (6, -1)

Frequently asked questions (FAQs)
What is the y-intercept of the cubic function f(x) = x^3?
+
What is the maximum value of the cosine function in degrees when the input angle is between 0 and 180 degrees?
+
What is 2.5 radians converted to degrees?
+
New questions in Mathematics
Use the digits of 1,9,2,3 to come up with all the numbers 98 and 95
³√12 x ⁶√96
2x-y=5 x-y=4
Suppose that a device has been created that launches objects at ground level and that its operation is modeled by the function h(x) = -4ײ + 256x, with h being the height (in meters) and x being the distance (in meters) What is the maximum height that the object reaches?
Suppose 50% of the doctors and hospital are surgeons if a sample of 576 doctors is selected what is the probability that the sample proportion of surgeons will be greater than 55% round your answer to four decimal places
Answer the following questions regarding the expression below. 0.1 (a) Write the number as a fraction.
In a grocery store, when you take out 3 peppers and 4 carrots, there are 26 peppers and 46 carrots left. How many peppers and carrots were there initially?
A recurring sequence is one where elements repeat after completing one standard. If the sequence AB8C14D96AB8C1... is recurring its twentieth term is equal to: (A) B. (B) 8. (C) A. (D) 6. (E) D.
Engineers want to design seats in commercial aircraft so that they are wide enough to fit ​95% of all males.​ (Accommodating 100% of males would require very wide seats that would be much too​ expensive.) Men have hip breadths that are normally distributed with a mean of 14.4 in. and a standard deviation of 1.2 in. Find P95. That​ is, find the hip breadth for men that separates the smallest ​95% from the largest 5​%.
The simple average of 15 , 30 , 40 , and 45 is
4+168×10³×d1+36×10³×d2=-12 -10+36×10³×d1+72×10³×d2=0
X~N(2.6,1.44). find the P(X<3.1)
Jasminder has made 55% of the recipes in a particular cookbook. If there are 9 recipes that he has never made, how many recipes does the cookbook contain?
For what values of m is point P (m, 1 - 2m) in the 2⁰ quadrant?
find missing measure for triangle area = 48 m square base = 10m heaighy = ? m
How to factorise 5y^2 -7y -52
2 - 6x = -16x + 28
calculate the product of 4 and 1/8
9n + 7(-8 + 4k) use k=2 and n=3
(3.1x10^3g^2)/(4.56x10^2g)