Question

(х-1)^2-16=0 решите уравнение

Answer 1

( Х - 1 )^2 - 16 = 0
( x - 1 )^2 - 4^2 = 0
( x - 1 + 4 )( x - 1 - 4 ) = 0
( x + 3 )( x - 5 ) = 0
X + 3 = 0 ; x = - 3
X - 5 = 0 ; x = 5
Ответ ( - 3 ) ; 5