Answer:

side= 2a+1

volume = (side )^3= (2a+1)^3=8a^3+1 +3×4a^2×1+3×2a×1^2=8a^3+1+12a^2+6a

Verified answer

Step-by-step explanation:

Given :-

Edge of cube = (2a + 1) cm

To Find :-

Volume

Solution :-

We know that

We will apply a identity which is

Here

a = 2a

b = 1

Hence,

Volume

welcome dearof cube is 8a³ + 12a² + 6a + 1 cm³