Ros3alnaormyfancelo Ros3alnaormyfancelo

23-11-2016
Mathematics

contestada

PLEASE HELP, easy.
What are the exact solutions of x^2-5x-7=0 ?

Respuesta :

thefaria thefaria

23-11-2016

x^2 - 5x - 7 = 0

x = (-b (+-) b^2 - 4ac) / 2a
a = 1, b = -5, c = -7

x = (-(-5) (+-) sqrt (-5^2) -4(1)(-7)) / 2(1)
x = (5 (+-) sqrt 25 + 28) / 2
x = (5 (+-) sqrt 53) / 2

Answer Link

Otras preguntas

which phrase best describes the cause of earthquake ? a. plate movements along fault lines b. the ring of fire c. intense vibrations d. movement of earth's crus

How do u divide monomials?

In the figure, GK (with an arrow pointing right) bisects angle FGH. (L = angle) if mL FGK = 3v - 4 AND mL KGH = 2v +7 a) 33 b) 58 c) 11 d) 29

Which of the following was NOT one of the effects of Reformation efforts?

What was the Spanish Flu? What were the symptoms? When did it take place?

I need an answer to, and what is 3/4x78% divided by 41 +113=

Which excerpts contain examples of epic similes? Check all that apply. and they would put one cupful—ruby-colored, honey-smooth—in twenty more of water, but s

The number of miles driven varies directly with the number of hours in the car. Billy drives 171 miles in 3 hours, so he could drive _____ miles in 4.5 hours.

What happens is the government does not allow the price to change when demand increases

Form the possessive of plural nouns that do NOT end in "s" by adding A) ' B) 's C) s' D) s