Question

x elevado a 3 - 4. x elevado a 2 + 5. x-7


quando x = 2

Answer 1

x³- 4.x² + 5.x - 7

(2)³ - (2)² + 5.(2) - 7

8 - 4 + 10 - 7

4 + 10 - 7

14 - 7

7

Answer 2

x³ - 4x² + 5x - 7 =
(2)³ - 4 * (2)² + 5 * (2) - 7 =
8 - 4 * 4 + 5 * 2 - 7 =
8 - 16 + 10 - 7 = 
-5