Meesh123 Meesh123

22-04-2015
Mathematics

contestada

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

Respuesta :

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

23-04-2015

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

Answer Link

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