2 years ago

What are the solutions of the equation: x2 – 1 = 15?

Mathematics

1 answer:

ankoles [38]2 years ago

8 0

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 = ± $\sqrt{16}$ = ± 4

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