1) S =6a²
a = 2x- 5
S = 6 * (2x - 5)² = 6 * (4x² - 20x +25) = 24x² - 120x + 150
S = 24x² - 120x + 150
2) V = a³
a = 2x - 5
V = (2x - 5)³ = (2x)³ - 3 * (2x)² * 5 + 3 * 2x * 5² - 5³ = 8x³ - 60x² + 150x - 125
V = 8x³ - 60x² + 150x - 125
1) S =6a²
a = 2x- 5
S = 6 * (2x - 5)² = 6 * (4x² - 20x +25) = 24x² - 120x + 150
S = 24x² - 120x + 150
2) V = a³
a = 2x - 5
V = (2x - 5)³ = (2x)³ - 3 * (2x)² * 5 + 3 * 2x * 5² - 5³ = 8x³ - 60x² + 150x - 125
V = 8x³ - 60x² + 150x - 125