Intermediate/Advanced Algebra

For more advanced algebra topics, including Algebra II and Pre-Calculus.
M
Let A be an nxn matrix such that A^2+A is invertible, show that A is also invertible.
Replies
1
Views
437
lex
L
J
Dot product of vectors
Replies
6
Views
686
pka
pka
J
Factoring with complex numbers
Replies
9
Views
2K
Steven G
Steven G
A
Impossible math problem
Replies
2
Views
403
Steven G
Steven G
P
Need an idea how to start a problem
Replies
5
Views
933
Deleted member 4993
D
I
What does a set with brackets means?
Replies
11
Views
1K
lex
L
P
Rationalizing the Denominator
Replies
8
Views
579
podi
P
Z
Quadratic equation coefficient question
Replies
2
Views
431
Otis
Otis
Z
Trouble with a quadratic coefficient.
Replies
1
Views
329
Otis
Otis
M
Simultaneous equations
Replies
5
Views
794
Steven G
Steven G
N
factorizing completely pls help T.T
Replies
7
Views
718
Dr.Peterson
Dr.Peterson
A
Finding the dimensions of a rectangle given the area and diagonal
Replies
10
Views
628
Am0stCr0ok3d
A
C
Solving for x in terms of other variables (with factors)
Replies
3
Views
417
JeffM
J
S
Write in Simplest Radical and Simplest exponential form
Replies
7
Views
695
lex
L
D
Solving problem by finding factor
Replies
3
Views
411
dsc2010
D
B
powers of complex numbers help
Replies
2
Views
769
HallsofIvy
H
C
How do I graph these Quadratic functions?
Replies
5
Views
682
lex
L
A
Jordan matrix and planes
Replies
0
Views
323
Aberashi
A
T
Finding the center of a cricle with two given points and a horizontal tangent.
Replies
7
Views
1K
lex
L
D
Sigma notation
Replies
5
Views
522
JeffM
J
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