Question

Given that v=√u*u- 2qs. Make q the subject of the equation. Find the value of q in the equation if v=8, u=12, and s=40​

Answer 1

Above given answer is correct.

Answer 2

Explanation:

v=√u*u- 2qs

1. 
   `√(20)` x 20 - 2q40 = 8
2. 
   `2√(5)` x 20 - 2q40 = 8
3. 40
   `√(5)` - 2q40 = 8
4. - 2q40 = 8 - 40
   `√(5)`
5. -80q = 8 - 40
   `√(5)`
6. q = (8-40
   `√(5)` ) / -80 =
   `(-1 + 5√(5) )/(10)` = 1.018