IDNLearn.com offers a collaborative platform for sharing and gaining knowledge. Get prompt and accurate answers to your questions from our community of experts who are always ready to help.

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


Sagot :

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
x² - 1 = 0
   + 1  + 1
      x² = 1
       x = +1