Answer:
<h2>35 cm³</h2>
Step-by-step explanation:
The formula of a volume of a cylinder:

r - radius
H - height
The formula of a volume of a cone:

If the cylinder and the cone have the same base (radius) and the same height, then the volume of the cone is three times smaller than the volume of the cylinder.

Therefore:

24
x
^2
+
54
x
+
21,
if you would like me to explain how to do it, I can in the comments.
Answer:
=1
=−7
Step-by-step explanation:
(+3)2−5=11
(+3)(+3)−5=11
2+3+3+9−5=11
2+6+9−5=11
x-1=0
x+7=0