The prism has 3 dimensions. So, if you double the linear sizes ("dimensions") the volume is multiplied by

.
Answer:
Need
Step-by-step explanation:
Shouldn't the equation read " (x - 4)² = 81 ", instead of "(1 - 4)² = 81" ?
If so, then the solutions are x = -5 and x = 13 .
If it's really "(1 - 4)² = 81", then that's not even an equation, and there's no solution.