lindseylewis313 lindseylewis313

20-09-2020
Mathematics

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If 2 - 4x = 18, evaluate x^2+ 2x – 1.

Respuesta :

christineangeline christineangeline

20-09-2020

Answer:

7

Step-by-step explanation:

2 - 4x = 18

-4x = 18 - 2

-4x = 16

4x = - 16

x = -16/ 4

x= -4

substitute x=4 ,

x ^ 2 + 2x -1

-4^2 + 2×-4 - 1

16 - 8 - 1

7

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