MATLAB: How to get solution of quadratic equation in decimal format

decimal formatquadratic

>> solve('2*x^2-4*x+5')

Solving equation gives answer in n/d format. i want anser in decimal foramt how to get it?

ans =

 1 - (6^(1/2)*i)/2
 1 + (6^(1/2)*i)/2

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double(ans)

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MATLAB: Displaying system format

The closest the symbolic toolbox can do is

>> x*[25;64;144] + y*[5;5;12] + z*[1;1;1] == [289;345;123]
ans =
   25*x + 5*y + z == 289
   64*x + 5*y + z == 345
 144*x + 12*y + z == 123
>> pretty(ans)
/  25 x + 5 y + z == 289  \
|                         |
|  64 x + 5 y + z == 345  |
|                         |
\ 144 x + 12 y + z == 123 /

It is not possible at the MATLAB level to prevent the multiplications from taking place (it is possible if you are working in a MuPad notebook.)

To get the output you are looking for, you will need to do the output formatting yourself.

MATLAB: How to solve an equation using “solve” and get a decimal approx

eq='x^2-2*x-7'
s=double(solve(eq))

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Related Solutions

MATLAB: Displaying system format

MATLAB: How to solve an equation using “solve” and get a decimal approx

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