09-02-2015
Mathematics

contestada

if x=-3, calculate the value of 2x squared -5

please explain how to do it please.

Respuesta :

09-02-2015

2x² - 5

WITH x = - 3

2 x (- 3)² - 5
= 2 x 9 - 5
= 18 - 5
= 13

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