Задание 26

Question

Найдите множество корней уравнения, переходя к совокупности линейных уравнений:
ewlineа) (х - 2)(2х + 7) = 0
ewlineб) (2х - 2)(х + 7)(3х - 1.2) = 0

Gimli · Accepted Answer

а)
$$\left[\begin{array}{rc1}{x - 2 = 0}\{2x + 7 = 0}\end{array}ight.\Leftrightarrow\left[\begin{array}{rc1}{x = 2}\{x = -3.5}\end{array}ight.$$
$x = {-3.5; 2}$
ewline

б)
$$\left[\begin{array}{rc1}{2x - 2 = 0}\{x + 7 = 0}\{3x - 1.2 = 0}\end{array}ight. \Leftrightarrow \left[\begin{array}{rc1}{x - 1 = 0}\{x = -7}\{3x = 1.2}\end{array}ight. \Leftrightarrow \left[\begin{array}{rc1}{x = 1}\{x = -7}\{x = 0.4}\end{array}ight.$$
$x = {1; -7; 0.4}$

Задание 26

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Задание 26

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