solve: sqrt (v) - 3 = 6

a) (-9)
b) (81)
c) (9)
d) none or 0

b just need to know if my answer is wrong or right

right

thanks

To solve the equation sqrt(v) - 3 = 6, you can follow these steps:

Step 1: Add 3 to both sides of the equation to isolate the square root expression:
sqrt(v) - 3 + 3 = 6 + 3
sqrt(v) = 9

Step 2: To eliminate the square root, square both sides of the equation:
(sqrt(v))^2 = 9^2
v = 81

So, the answer is (b) 81.

By squaring both sides of the equation, you automatically generate an additional solution. That's why we always need to double-check if the obtained solution satisfies the original equation. In this case, confirming that sqrt(81) - 3 = 6, we can conclude that option (b) is indeed the correct answer.