How find the 3 value of x by using Calculator

[r-soy]

Hi all

How find the 3 value of x by using Calculator

u = 4x^3 - 4x = 0

I know this good way to solve iy

4x(x^2-1) = 0
X = 1 or X = -1 or X = 1

but I want a way bu useing a Calculator to find the 3 value of x

plese help me .

 

[Coto]

The class of techniques are called root finding techniques and requires you to have something a little more hefty than a scientific calculator. Every calculator has a different layout so it's up to you to look up on google the instructions for your calculator to find out if or if not it has a "root finding" function.

 

[Mark44]

Hi all

How find the 3 value of x by using Calculator

u = 4x^3 - 4x = 0

I know this good way to solve iy

4x(x^2-1) = 0
X = 1 or X = -1 or X = 1

There are three different solutions to this equation, with none of them repeated.

but I want a way bu useing a Calculator to find the 3 value of x

plese help me .

 

[HallsofIvy]

If you are using a graphing calculator, graph the function $y= 4x^2- 4x$ and "zoom" in on the points where the graph crosses the y- axis.