Question

Make U the subject of the formula D = ut + kt2

Answer 1

Remark

I'm going to interpret this equation as

D = ut + kt²  The only difference is the 2.

Solution

Subtract kt² from both sides.

D - kt² = ut   Now divide by u on both sides.

$\dfrac{D - kt^2}{t} = \dfrac{ut}{t}$

The t's cancel out. on the right.  You are left with u on the right.

$\dfrac{D - kt^2}{t} =\text{u}$