matlab solver with respect to x^2

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Jinho Lee
Jinho Lee on 13 May 2022
Commented: Jinho Lee on 13 May 2022
I have some questions for matlab solve
If I have an equation like x^2+x^4=a and try to find solution, I could use matlab solve
My question is instead to solve x, is there any way to solve equation with respect to x^2...?
For example
equ1=x^2+x^4==a
S=solve(equ1,x^2)....?
another question is if I want to solve the above equation with a=1
How to use "solve"(S=solve(equ1, x,a==1) is not working properly...

Answers (1)

Chunru
Chunru on 13 May 2022
Edited: Chunru on 13 May 2022
syms x a y
equ1=x^2+x^4==a
equ1 = 
equ2 = subs(equ1, x^2, y)
equ2 = 
S=solve(equ1,x)
S = 
Sx2 =solve(equ2)
Sx2 = 
subs(Sx2, a, 1)
ans = 

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