Solve for exponent variable

syms x y z a b c Q N P S
Q= x^a
S = solve(Q==(x^4),a)
S-4
% why the answer is not zero and how to make it?

Answer 1

[Ameer Hamza]

You need to specify the assumption that .

syms x y z a b c Q N P S
assume(x, 'positive')
Q = x^a
S = simplify(solve(Q==(x^4),a))
S-4

[Mohamed Mahmoud]

It worked for defined numbers but not the variables

assume(T,'positive')
S=T^2*T^a
(solve(S==(T^1),a))

[Mohamed Mahmoud]

Solved TY