35 Вправа 35Алгебра 8 клас Бевз 2025 · § 1 · стор. 12

а) ${\displaystyle \frac{2x}{x(x+7)(x-2)}}$

${\displaystyle x\ne 0}$, ${\displaystyle x+7\ne 0}$, ${\displaystyle x-2\ne 0}$;

${\displaystyle x\ne 0}$, ${\displaystyle x\ne -7}$, ${\displaystyle x\ne 2}$;

б) ${\displaystyle \frac{4}{(1+2x)(x^2-9)}}$

${\displaystyle 1+2x\ne 0}$, ${\displaystyle x^2\ne 9}$;

${\displaystyle x\ne -0,5}$, ${\displaystyle x\ne \pm 3}$;

в) ${\displaystyle \frac{5a}{(a^2+3)(3a^2+2)}}$

${\displaystyle a^2+3>0}$, ${\displaystyle 3a^2+2>0}$;

a — будь-яке число;

г) ${\displaystyle \frac{m+12}{m^2-8m+16}}$

${\displaystyle m^2-8m+16=}$${\displaystyle {(m-4)}^2}$;

${\displaystyle m-4\ne 0}$;

${\displaystyle m\ne 4}$.