Question

Make y the subject of this formulae X=a-2by^2

Answer 1

See below

Explanation:

x=a-2by^2 Subtract 'a' from both sides

x -a = - 2 by^2 divide both sides by - 2b

(a-x)/2b = y^2 sqrt both sides

y = +- sqrt ( (a-x)/2b))

Answer 2

y = ±
`\sqrt{((a-x))/(2b)}`

Explanation:

x = a - 2by²

Take -2by² to the left side.

x + 2by² = a

Take x to the left side.

2by² = a - x

Divide both sides by 2b.

y² =
`((a-x))/(2b)`

Now remove the y square.

y = ±
`\sqrt{((a-x))/(2b)}`