- #1
TW Cantor
- 54
- 1
Homework Statement
The matrix A is given as:
[25 , 5]
[-150 , -30]
find, in terms of m, the expression det(A-mI). This will be in a quadratic expression in m.
Homework Equations
det(A) = ad-bc
The Attempt at a Solution
i have no idea how to approach this but i worked out the det(A) using the equation above to be 0. This makes this matrix singular. I dont understand what the I and the m are representing