Question

Решите уравнение (х^2-4)(\х\-7)(1/2х-19)=0

Answer 1

(х^2-4) (|х|-7)(1/2х-19)=0

(x^2-4)=0       или    |x|-7=0               или   1/2х-19=0

(х-2) (х+2)=0            Если |x|=x, то               1/2х=19

х=2                             х-7=0                              0,5х=19

х=-2                            х=7                                  х= 38

                                   Если |x|=-x, то             

                                   -х-7=0

                                   -х=7

                                    х=-7

ответ: 2, -2, 38, если |x|=x, то  х=7, если |x|=-x, то х=-7