jameelsadril jameelsadril

16-04-2021
Mathematics

contestada

Really need help
Five less than twice what negative number squared is 157?

Respuesta :

thebecks thebecks

16-04-2021

Answer:

-9

Step-by-step explanation:

2(-x)² - 5 = 157

2x² - 5 = 157

add 5 to each side of the equation:

2x² = 162

divide both sides by 2:

x² = 81

√81 = 9 or -9

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