sammygirl73
sammygirl73
19-06-2020
Mathematics
contestada
Solve: 4x^-2 – 3x^-1– 1 = 0
Respuesta :
mhanifa
mhanifa
03-09-2020
Answer:
1, -4
Step-by-step explanation:
4x^-2 – 3x^-1– 1 = 0
Let x^-1 = 1/x = y
4y^2 - 3y - 1 = 0
4y^2 - 4y + y - 1 = 0
(y - 1) (4y + 1) = 0
1. Root 1
y - 1 = 0
y = 1
1/x= 1
x = 1
2. Root 2
4y + 1 = 0
4y = -1
y = -1/4
1/x = - 1/4
x = -4
Answer Link
VER TODAS LAS RESPUESTAS ( 13+ )
ACCESS MORE
Otras preguntas
There are 20 identical sticks lined up in a row occupying 20 distinct places as follows: 11111111111111111111· Six of them are to be chosen. (a) How many choice
Find the measures of angles in triangle ABC if m∠A: m∠B: m∠C= 2:3:4
Prove that the product of any two consecutive natural numbers is even.
Find the value of in the triangle shown below.
Chondroblasts ________. Chondroblasts ________. are mature cartilage cells located in spaces called lacunae never lose their ability to divide remain in compact
I want to buy a book that is on sale with a 50% discount. if the sales price is $25. what was the original price?
-7. This Nubian kingdom was formed when the stronger villages overtook weaker ones. A. Kerma C. Napata B. Kush D. Sudan (Please help)
Simplify! PLEASE HELP!!! Asap!!
Why is street art often illegal?
What’s 48 divided by 8
