What is the uniform trouble?
The response to what I assume you are asking:
The uniform trouble is : "Given a matrix $A$, locate all remedies to the trouble $Ax = 0$, where $x$ is a vector of ideal measurement, and also '0' is the vector of all absolutely nos".
The Nullspace of $A$ is specifically the set of all such remedies. There is constantly at the very least one remedy to the uniform trouble. Without a doubt, $x=0$ (the vector of all absolutely nos) is constantly a remedy. In case where $A$ is a square and also invertible matrix, $x=0$ is the only remedy. As a whole, there can be various other remedies, and also the set of all remedies (the Nullspace) is in fact a subspace. To see why, notification that if $x_1$ and also $x_2$ both please $Ax=0$, after that so does $a_1 x_1 + a_2 x_2$.
I wish this solutions your inquiry. Best of good luck!
HINT $\ $ For $\rm A\:$ linear, $\rm\ A\:X_1 = B = A\:X_2 \ \iff\ 0 \:=\: A\:X_1 - A\:X_2 = A\:(X_1-X_2)$
This indicates that the basic remedy of $\rm\ \ \ \:A\:X = B\ $ is the amount of any kind of certain remedy plus a remedy of the linked "uniform" formula $\rm\ A\:X = 0\:$. This building applies for every single linear driver, as an example for matrices, straight differential formulas, straight reappearances, etc