Yet another Physics problem......?

Question

Three vectors that are neither parallel nor antiparallel can be arranged to form a triangle if they sum to (0, 0). (a) What vector forms a triangle with (0, 3) and (3, 0)? (b) If you multiply all three vectors by the scalar 2, do they still form a triangle? (c) What if you multiply them by the scalar a?

Answer 1

or solve equation for x and y components separately.
for x 0 +3+?=0
for y 3+0 +?=0

Answer 2

yes and yes

Graph it out it is simple