i am wanting to rearrange to make h the subject h the subject and then b the subject
S= √(b2-h2)
can someone please help me
steve
Is your equation $\displaystyle S = \sqrt{b^2-h^2}$ ?
If so start by squaring both sides,
$\displaystyle S = \sqrt{b^2-h^2}$
$\displaystyle S^2 = b^2-h^2$
Then adding $\displaystyle h^2$ to both sides
$\displaystyle S^2+h^2 = b^2$
Finally taking the square root of both sides.
$\displaystyle \sqrt{S^2+h^2} = b$
$\displaystyle b = \sqrt{S^2+h^2} $
Do you follow?
No, if you want to make it this way, it's a little different.
$\displaystyle S = \sqrt{b^2-h^2}$
Square both sides:
$\displaystyle S^2 = b^2-h^2$
Now, Move b^2;
$\displaystyle S^2 - b^2 = -h^2$
You see that there is a minus sign? Multiply both sides by -1:
$\displaystyle -S^2 + b^2 = h^2$
Rearrange:
$\displaystyle b^2 - S^2= h^2$
Now, you take the square root.
$\displaystyle \sqrt{b^2 - S^2}= h$
$\displaystyle h = \sqrt{b^2 - S^2}$