Ubcdjhjdhj Ubcdjhjdhj
  • 23-02-2017
  • Mathematics
contestada

What are the x-intercepts of 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 :

Аноним Аноним
  • 23-02-2017
x-intercepts  when y = 0
so

 2x^2 - 3x - 20 = 0
(2x + 5)(x - 4) = 0

2x + 5 = 0
x = -5/2
x = -2.5

x - 4 = 0
x = 4

answer:

C) x = -2.5 and 4 
Answer Link

Otras preguntas

Which feature of a state believes in sharing similar beliefs in order to establish a more stable government
what treaty or alliance caused great britain to enter WW1
Content analysis is a type of secondary data analysis is it true or false?
Shaun is reading the following sentence about creating beautiful glass artwork: When glass is heated at very high temperatures, it becomes malleable, which allo
An eosinophil is a white blood cell involved in controlling infections. The white blood cell is a part of the ^____________ system, while the red blood cells ar
Parliaments “ Power of the purse” meant that it has the ability to tax and spend money. True or false
sammy what is 8/x=5/9
what is n/8=11/5 solve for n #youngboy comment
How to write an report for natural disaster
need help with ixl please give right answer