364 Вправа 364Алгебра 8 клас Бевз 2025 · § 8 · стор. 76

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а)

${\displaystyle 2x-8=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle 4}$

${\displaystyle 3x+15=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle -5}$

б)

${\displaystyle 16+4y=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle -4}$

${\displaystyle 3-6y=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle 0,5}$

в)

${\displaystyle 6x-18=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle 3}$

${\displaystyle x(x+5)=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle 0}$ або ${\displaystyle x=}$${\displaystyle -5}$

г)

${\displaystyle 1+3a=}$${\displaystyle 0}$, ${\displaystyle a=}$${\displaystyle -\frac{1}{3}}$

${\displaystyle a(2-a)=}$${\displaystyle 0}$, ${\displaystyle a=}$${\displaystyle 0}$ або ${\displaystyle a=}$${\displaystyle 2}$

ґ)

${\displaystyle y^2-25=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle \pm 5}$

${\displaystyle 4y-3=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle 0,75}$

д)

${\displaystyle 5x+2=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle -0,4}$

${\displaystyle 16-x^2=}$${\displaystyle 0}$, ${\displaystyle x=}$${\displaystyle \pm 4}$

е)

${\displaystyle {(a-1)}^2=}$${\displaystyle 0}$, ${\displaystyle a=}$${\displaystyle 1}$

${\displaystyle 2a-1=}$${\displaystyle 0}$, ${\displaystyle a=}$${\displaystyle 0,5}$

є)

${\displaystyle 3y-2=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle \frac{2}{3}}$

${\displaystyle {(y+2)}^2=}$${\displaystyle 0}$, ${\displaystyle y=}$${\displaystyle -2}$