3a³(2a²- a + 4) - 6a⁵ = 6a⁵ - 3a⁴ + 12a³ - 6a⁵ = -3a⁴ + 12a³
a = - 3
- 3 * (- 3)⁴ + 12 *(- 3)³ = - 243 - 324 = - 567
3a³(2a²- a + 4) - 6a⁵ = 6a⁵ - 3a⁴ + 12a³ - 6a⁵ = -3a⁴ + 12a³
a = - 3
- 3 * (- 3)⁴ + 12 *(- 3)³ = - 243 - 324 = - 567