When you rewrite or simplify an expression, does the value of that expression change?
Find at least three ordered pairs that are solutions
x+4y-6=0
Find a least-squares solution 𝑥̂ of Ax=b and the least-squares error :𝑨 =
[ 1 3
1 −1
1 1 ]
𝒃 =
[ 5
1
0 ]