03-06-2020
Mathematics

contestada

What are the solutions of the equation: x2 – 1 = 15?
x = ± sqrt 14
x = ± sqrt 15
x = ±4
x = ±8

Respuesta :

jimrgrant1 jimrgrant1

03-06-2020

Answer:

x = ± 4

Step-by-step explanation:

Given

x² - 1 = 15 ( add 1 to both sides )

x² = 16 ( take the square root of both sides )

x = ± [tex]\sqrt{16}[/tex] = ± 4

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