Ⲁⲛ⳽ⲱⲉⲅ:
Ⲋⲟⳑⳙⲧⳕⲟⲛ :
Volume of a cube is calculated by multiplying it's length, width and height
- But, in a cube all the sides are equal. Therefore, the values of length, width and height of a cube are same .
➲ Now, calculating the volume of given cube:
➙ V = length × width × height
➙ V = ( 3x + 2 ) × ( 3x + 2 ) × ( 3x + 2 )
➙ V = ( 3x + 2 )³
➙ V = ( 3x )³ + ( 2 ) ³ + 3 ( 3x ) ( 2 ) ( 3x + 2)
➙ V = 27x³ + 8 + 18x ( 3x + 2 )
➙ V = 27x³ + 8 + 54x² + 36x
➙ V = 27x³ + 54x² + 36x + 8
⳨ⲟⲅⲙⳙⳑⲇ ⳙ⳽ⲉ∂ :
- ( a + b ) ³ = a³ + b³ + 3ab ( a + b )
