Answer:
d = 2
Explanation:
You want to solve for d by itself, so you must take the square root of both sides.
d =
![√(68)](https://img.qammunity.org/2021/formulas/mathematics/middle-school/b7uyyynfl6abpdyxdxzny1x4r8xot9i4er.png)
This can be simplified, since this square root has a perfect square inside. You take out the perfect square (which is 4) and end up with 2