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

Otras preguntas

In the step by step simplification of expression below which property is not used? 3(1+x)3(x+1)3(x)+3(1)3x +3 A) associative B) commutative C) distributive D)

In the step by step simplification of expression below which property is not used? 3(1+x)3(x+1)3(x)+3(1)3x +3 A) associative B) commutative C) distributive D)

You have a piece of wood that is 7 3/4 feet long. You want to cut one piece that is 3 7/12 feet long and one piece that is 4 1/12 feet long. Do you have enou

Proof: Given: Isosceles trapezoid TRAP with TR=PA Prove: Angle RTA = angle APR

i need with math it say the ride-it store rents bicycles. the cost is $8.50 for 1 hour, $13.64 for 2 hours, $18.80 for 3 hours, and 23.95 for 4 hours. if the pa

In the step by step simplification of expression below which property is not used? 3(1+x)3(x+1)3(x)+3(1)3x +3 A) associative B) commutative C) distributive D)

In the step by step simplification of expression below which property is not used? 3(1+x)3(x+1)3(x)+3(1)3x +3 A) associative B) commutative C) distributive D)

Proof: Given: Isosceles trapezoid TRAP with TR=PA Prove: Angle RTA = angle APR

Proof: Given: Isosceles trapezoid TRAP with TR=PA Prove: Angle RTA = angle APR

You have a piece of wood that is 7 3/4 feet long. You want to cut one piece that is 3 7/12 feet long and one piece that is 4 1/12 feet long. Do you have enou

ACCESS MORE