brodienorred brodienorred

12-11-2021
Mathematics

contestada

Solve each equation by completing the square.

X^2 +2x-5=0

N^2-20n+2=4

Respuesta :

reinhard10158 reinhard10158

15-11-2021

Step-by-step explanation:

x² + 2x - 5 = 0

that is the same as

x² + 2x + 1 = 6

(x + 1)² = 6

x + 1 = ±sqrt(6)

x = -1 ± sqrt(6)

x1 = -1 + sqrt(6)

x2 = -1 - sqrt(6)

n² - 20n + 2 = 4

this is the same as

(n - 10)² = 102

n - 10 = ±sqrt(102)

n = 10 ± sqrt(102)

n1 = 10 + sqrt(102)

n2 = 10 - sqrt(102)

Answer Link

Otras preguntas

.Resuelve los siguientes ejercicios: a. El siguiente conjunto de datos forma una población: 2, 4, 6, 8, 10. Calcular: • Rango. • Varianza. • Desviación estándar

Find the polar coordinate with (- pi )/(2)<θ <( pi )/(2) for the following Cartesian coordinates: If (x,y)=(-10,-10) then (r,θ )=

A large group of butterflies migrate from a summer breeding ground to a warmer winter ground. Which type of adaptation does this statement describe? a. behavior

b.5 feet -How long ore cut off from a board that is 15th feet long is the remaining part of the board.

How do you think the media and popular culture representations of Black Americans, particularly Black men, have contributed to a dangerous climate of white fear

Using the prototype oblique triangle shown below and the information given, find the measure of the remaining sides and angles in the triangle. If a=21.9781, be

Compare Steele's experience with that of Carl Westmoreland's, according to Alvin Hall. In the green book

Determine the values of sinθ and cosθ given that the terminal side of angleθ intersects the unit circle in the first quadrant at ((19)/(20),y).

Which of the following tonsils commonly gets removed due to frequent infections? 1) Pharyngeal 2) Palatine 3) Lingual 4) All of the above

All of the following criticisms are leveled at raising school funds through property taxes EXCEPT:A. It is often harder for communities with low home ownership