Answer:
d.x=-8 and x=-10
Step-by-step explanation:
I can't read that language but I'll guess it says write a second degree equation then solve for n when d=10.



Answer: n² - 3n - 20 = 0
That doesn't factor so there is no integer n solution.
That means there are no polygons with 10 diagonals.

weii ni yo entiendo esa mamada:u
Answer:
quadratic
Step-by-step explanation: