Question

(x-9)^2=1

Answer 1

This will have 2 values
Square root both sides
(x-9) = sqrt 1
x-9 = +-1
x - 9 = +1 [x=10]
x-9 = -1 [And you get another value of x]

Understood? :)

Answer 2

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Answer 3

use the identity (a-b)^2 = a^2 + b^2 - 2ab to simplify LHS

subtract 1 from both sides

factorize the polynomial

equate each factor to 0 to obtain the result.

Answer 4

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