Question

Please help to Solve for v.

Answer 1

v^2 +3v - 4 = 0
(v - 1)(v + 4) = 0
v - 1 = 0; v = 1
v + 4 = 0; v = -4
answer
v = -4; v = 1

Answer 2

v^2 + 3v - 4 = 0 can be factored:  (v+4)(v-1) = 0.  Then v = -4 and v = 1.