- #1
Bashyboy
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Homework Statement
Consider the system ##AX=0##, where
$$A = \begin{bmatrix} a & b \\ c & d \\ \end{bmatrix}$$
is a 2x2 matrix over the field F. Prove that if ##ad-bc=0## and some entry of ##A## is different from ##0##, then there is a solution ##(p,q)## such that ##(x,y)## is a solution if and only if there is some scalar ##t## such that ##x=pt## and ##y = qt##.
Homework Equations
The Attempt at a Solution
Am I asked to find the vector ##(p,q)## for which the statement "##(x,y)## is a solution if and only if there is some scalar ##t## such that ##x=pt## and ##y = qt##" holds, or am I assuming that I have such a solution ##(p,q)## and proving that this statement?