Solve for v:
v^2-6 v-18 = 0
Add 18 to both sides:
v^2-6 v = 18
Add 9 to both sides:
v^2-6 v+9 = 27
Write the left hand side as a square:
(v-3)^2 = 27
Take the square root of both sides:
v-3 = 3 sqrt(3) or v-3 = -3 sqrt(3)
Add 3 to both sides:
v = 3+3 sqrt(3) or v-3 = -3 sqrt(3)
Add 3 to both sides:
Answer: | v = 3+3 sqrt(3) or v = 3-3 sqrt(3)
