samuel544 samuel544

06-06-2019
Mathematics

contestada

What is the value of -2x2 + 8x
when x = -6?

Respuesta :

06-06-2019

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

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