maura2mconroy0547 maura2mconroy0547

26-01-2017
Mathematics

contestada

solve the quadratic equation x^2-2x-8=0

I have tried many ways for this one but it ends up being a ridiculous answer.

Respuesta :

PsychrolutesMarcidus PsychrolutesMarcidus

26-01-2017

Using cross multiplication

[tex] x^{2} -2x-8 =0[/tex]
(x-4)(x+2)=0
x-4=0
x+2=0

Thus x=4,-2

Answer Link

Otras preguntas

A few sentences with the word thwart?

Most people of West and Central Africa make a living in which area

In what way is sedimentary rock formation in nature like a sieve? A. Sedimentary rocks are filtered over time. B. Rocks go through many stages during their form

If 80 is 80% of a value, what is that value

state two ways of velocity

Giselle is painting the inside of her house. She needs 1.6 gallons of paint to cover the walls in each room. There are 4.5 rooms to paint in her house. Two o

The viral reproductive cycle in which a virus infects a cell makes many copies of itself and destroys the cell is the A. viroid cycle. B. lytic cycle. C. lysoge

An antecedent is A. the verb that shows the action in the sentence. B. the noun or pronoun to which a pronoun refers. C. an adjective that appears after the no

Calculate the kinetic energy of a particle with a mass of 3.34 × 10^–27 kilogram and a speed of 2.89 × 10^5 meters per second. [Show all work, including the equ

Anatolia is an ancient name for A. Italy. B. Rome. C. Turkey. D. Greece.