Question

Make c the subject of p=c2/c2+4

Answer 1

`p= (c^2)/(c^2 + 4)`

`c^2 p + 4 p = c^2`

`4 p = c^2 - c^2 p = c^2(1-p)`

`c^2 = (4p)/(1-p)`

`c = \pm \sqrt{(4p)/(1-p) } = \pm 2 \sqrt{(p)/(1-p) }`

Answer:
`\quad c = \pm 2 \sqrt{(p)/(1-p)`