frostbytten frostbytten

12-03-2018
Mathematics

contestada

y = 2x2 - 3x - 20?
A) x = -5 and 2
B) x = 5 and -2
C) x = -2.5 and 4
D) x = 2.5 and -4

Respuesta :

yellowyarn2003 yellowyarn2003

12-03-2018

2x² - 3x - 20

40
2 20
4 10
5 8

2x² - 8x 5x - 20
2x(x - 4) 5(x - 4)
(2x + 5) (x - 4)
2x + 5 = 0 x - 4 = 0
2x = -5 x = 4
x = -5/2
C) x = -2.5 and 4

Answer Link

Otras preguntas

Which of the following is an example of applying a force? A. an airplane soaring through the sky B. a train speeding down a track C. a carpenter hammering a n

Why is Columbus day important?

What are two forms of visual arts? Describe each

6. Eugene O'Neill grew up in a theatrical family. A) prepositional B) partical C) gerund D) infinitive 7. Both of his parents, James and Ella, were actors.

10 facts on how tornadoes and hurricanes are alike.

RT has the endpoints (0,2) and (4,2) what is its midpoint

The central idea of the story the leap

what may have been an effect of achebes writings on his native country?

Choose the correct answer. What subject pronoun would you use when talking about María? ellas ellos ella ustedes Choose the correct answer. What subject

When you insert an object in a document, Word always inserts it as a floating object. true or false