Answer:
- 120
Step-by-step explanation:
-2 x² + 8 x = 0
x = - 6
Substitute x = - 6 into -2 x² + 8 x = 0
- 2 x² + 8 x = 0
- 2 × ( - 6² ) + 8 × ( - 6 ) = 0
( - 2 × 36 ) + ( 8 × -6) = 0
- 72 + ( - 48 ) = - 120
