Answer:
The answer is option 1.
Step-by-step explanation:
You have to substitute the expressions of s into the formula of volume :
s = 4x² + 3
V = s³
V = (4x² + 3)³
Then, you have to expand it :
V = (4x² + 3)³
V = (16x⁴ + 24x² + 9)(4x² + 3)
V = 16x⁴(4x²) + 16x⁴(3) + 24x²(4x²) +
24x²(3) + 9(4x²) + 9(3)
V = 64x⁶ + 48x⁴ + 96x⁴ + 72x² + 36x² + 27
V = 64x⁶ + 144x⁴ + 108x² + 27
