Answer:
v = 1/2 and v = -5/2
Step-by-step explanation:
4v^2 + 8v -5 =0
Factor it out:
(2v-1)(2v+5)=0
2v-1 = 0
2v = 1
v= 1/2
2v +5 = 0
2v = -5
v = -5/2
