farzadkarim
farzadkarim farzadkarim
  • 07-06-2016
  • Mathematics
contestada

What are the exact solutions of x^2 − x − 4 = 0?

Respuesta :

μnibble μnibble
  • 07-06-2016
x= 0.5 + √(17)/2, x= 0.5 - √(17)/2

Working:
x^2 - x - 4 = 0
x^2 - x = 4
(x - 0.5)^2 - (0.5)^2 = 4
(x - 0.5)^2 = 4.25
x - 0.5 = ±√(17/4)
x = 0.5 ± √(17)/2
Answer Link

Otras preguntas

How many angles are formed by intersecting roads? Number the angles
All of the following are characteristics of a tragic hero EXCEPT: A. Separated from society; an outlaw B. Noble in nature yet with imperfections C. Excessive pr
I need help with this
Find the magnitude and direction (in degrees) of the vector. (Assume 0° ≤ < 360°.) = 6i + 2sqrt3j
Which circle will have the largest radius? O OAC = 16 cm OOD.r=20 cm OOC.r= 21 cm O OB. C = 18 cm
Question 5 of 10 Factor the polynomial: x(3x + 5) - 4(3x + 5) A. -4x(3x + 5) B. (3x + 5)(x + 4) C. 4x(3x + 5) D. (3x + 5)(x-4) HURRY PLEASE
How do you simplify the fractions 4/5 + 3/4 in lowest terms
Which of the following is the primary source of empirical evidence? A.) beliefs B.) principles C.) senses D.) methods
Why are sunflowers planted in nuclear affected areas?.
what impact did the development of paved roads have on the ancient Roman civilization?Roads limited the amount of Roman explorationRoads led to increased invasi