Meesh123
Meesh123 Meesh123
  • 22-04-2015
  • Mathematics
Answered

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

Answer :

belcatya
belcatya belcatya
  • 22-04-2015
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
Answer Link
Panoyin
Panoyin Panoyin
  • 22-04-2015
x² - 1 = 0
   + 1  + 1
      x² = 1
       x = +1
Answer Link

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