Answer:
see explanation
Step-by-step explanation:
Let u = x² ( choice of variable is flexible ), then
4u² - 21u + 20 = 0 ← expressed as a quadratic
This can now be solved for u and converted back into terms of x
60 inches because the square has 4 sides so 4x2 is 8 and 52+8 is 60.
Answer:
The shape is plane, a rectangle
Step-by-step explanation:
The external figure, the cylinder is a rectangle in a two dimensional plane, so the cross section between two rectangles is also a rectangle
