Can I check if factored and expanded polynomial forms are equal?
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>> syms w k
>> isequal((w^2-k^2),(w+k)*(w-k))
ans =
logical
0
Is there a way to tell that w^2-k^2 and (w+k)*(w-k) are equal?
Also tried isequal(expand(),expand()) method but expand() may order two polynomials that are the same differently and in these instances isequal() returns logical = 0.
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Risposta accettata
Vladimir Sovkov
il 1 Feb 2020
Modificato: Vladimir Sovkov
il 1 Feb 2020
simplify((w^2-k^2) - (w+k)*(w-k))
ans =
0
expand((w+k)*(w-k))
ans =
w^2 - k^2
factor(w^2-k^2)
ans =
[ -1, k - w, k + w]
1 Commento
Vladimir Sovkov
il 1 Feb 2020
isequal ( sort ( factor(w^2-k^2) ) , sort ( factor((w-k)*(w+k)) ) )
ans =
logical
1
Più risposte (1)
Steven Lord
il 1 Feb 2020
>> syms w k
>> x1 = (w^2-k^2);
>> x2 = (w+k)*(w-k);
>> isAlways(x1 == x2)
ans =
logical
1
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