Vectors v1 = [3, 4], v2 = [3, -5], v3 = [1, 0] span? But do not form a basis. Find two different ways to express [1, 2] as a linear combination of v1, v2, v3.
a) [1, 2] = 2v1 - v2
b) [1, 2] = v1 + v2 - v3
c) [1, 2] = 3v1 + 2v2
d) [1, 2] = v1 - v2 + 2v3