Why we can't differentiate both sides of a polynomial equation?
17452
Is differentiating on both sides of an equation allowed?
41655
Simple equation for $x$ but getting no proof.
51159
Proof of relation between divided difference and interpolation polynomial coefficient
147047
Does there exist a polynomial $p(x) \in \mathbb C[x]$ such that $p(x) \notin \mathbb R[x]$ and $p(x)p(-x)=p(x^2)$?
24441
Inverse of a matrix is expressible as a polynomial?
1519
Sum of derivatives of a polynomial
137291
Why can't Mathematica integrate this?
27888
Why is $|x|$ not differentiable at $x=0$?
124073
solving for one solution to a system of polynomials
40426
Polynomial degree 3 Equation
112783
Is it mathematically valid to separate variables in a differential equation?
70723
Why are nonsquare matrices not invertible?
132410
Difficult Polynomial Question
30333
Why does Mathematica not restrict the domains of Rational Expressions?
132365
Why is absolute value function not a polynomial?
51019
Polynomial problem with two conditions
21709
Nsolve gives solutions with a small complex part which can't be eliminated by chop command