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awarded  Popular Question
Aug
21
accepted Factoring $x^3-8$ by grouping
Aug
21
comment Factoring $x^3-8$ by grouping
@Winther that works - but how did you figure that? Just made up?
Aug
21
comment Factoring $x^3-8$ by grouping
Sorry, how did you realize that $x^3 - 8 = (x^3 + 2x^2 + 4x) + (-2x^2 - 4x - 8)$?
Aug
21
asked Factoring $x^3-8$ by grouping
Jul
7
accepted Finding two matrices that permit a change of variable eliminating the crossed term.
Jul
7
asked Finding two matrices that permit a change of variable eliminating the crossed term.
Jul
6
accepted Surjective linear transformations: is checking for linear independency enough?
Jul
6
accepted Gram-Schmidt: Do the sets have some sort of order?
Jul
6
asked Surjective linear transformations: is checking for linear independency enough?
Jul
6
asked Gram-Schmidt: Do the sets have some sort of order?
Jul
5
accepted Calculating an orthonormal base given another base.
Jul
5
comment Calculating an orthonormal base given another base.
Aha, this worked! I'll keep on testing it. Do you know why my particular approach didn't work?
Jul
5
comment Calculating an orthonormal base given another base.
By "second vector" you mean $(a,b,c)$?
Jul
5
asked Calculating an orthonormal base given another base.
Jul
3
accepted Is this procedure for $5^{300} \bmod 11$ correct?
Jul
3
asked Is this procedure for $5^{300} \bmod 11$ correct?
Jul
3
asked Using the euclidean algorithm to find the inverse of $50 \mod 3$
Jul
3
comment Finding the smallest $x$ given a set of congruence conditions.
Did you mean $123$ instead of $133$?
Jul
3
asked What if I am not given the labels of a Karnaugh map?