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H n I g. x V I .. Bi h H- . .

H n I g. x V I .. Bi h H- . .-example-1
User George Co
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2 Answers

3 votes
x^2= 169
⇒ x^2 -169= 0
⇒ x^2- 13^2= 0
⇒ (x-13)(x+13)= 0
⇒ x-13= 0 or x+ 13= 0
⇒ x= 13 or x= -13

The correct answer is 13 and -13.
User RohitS
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8.5k points
3 votes

x^(2) =169\\\\√(x^2) =\pm√(169)\\\\x =\pm √(169)\\\\x =\pm 13\\\\\boxed{\bf{x = 13}}\\\boxed{\bf{x=-13}}
User Shemsu
by
8.0k points

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