I am new to this least square solution. If a and b are column vectors in $\Bbb R^N$, then wouldn't the least square solution of a$x$=b be $A^TAx = A^Tb$?
I am really having a hard to visualizing this.
2026-04-07 08:22:17.1775550137
Derive a formula for the least squares solution with two column vectors
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