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3 votes
How do you do this problem?
Solve by factoring or finding square roots.
x^2-1=0

2 Answers

6 votes
x² - 1 = 0
+ 1 + 1
x² = 1
x = +1
User Shafi
by
8.1k points
5 votes
use formula^: a²-b²= (a-b)(a+b)
x²-1=0
x²-1²=0
(x-1)(x+1)=0
x-1=0⇒ x₁=-1
x+1=0 ⇒x₂=1
Answer: x=+-1
User Willwade
by
8.4k points

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