Answer:
-4x^4-6x^3-8x^2-24x
Step-by-step explanation:

distribuir parênteses

Aplicar regras de menos mais ;

simplificar

Answer:
12. Triangle; heptagon
13. 180(n - 2)
14. nonagon
that's all ik sorry but hope it helps a lil :)
w represents width
4w represents length
d represents diagonal
w2 + (4w)2 = d2
w2 + 16w2 = d2
17w2 = d2
±w√17 = d
The diagonal is the width times √17.
Answer:
n+1=x-1
Step-by-step explanation:
as n goes up, x decreases by 1 each time
Answer:
2
Step-by-step explanation:
that is √ 14 which is 27 ×>44.2177