145 Вправа 145Алгебра 8 клас Бевз 2025 · § 4 · стор. 35

145. Додай дроби.

а) ${\displaystyle \frac{a}{2x}+\frac{3}{2x}=}$${\displaystyle \frac{a+3}{2x}}$;

б) ${\displaystyle \frac{2c^2}{3ab}+\frac{1-c^2}{3ab}=}$${\displaystyle \frac{2c^2+1-c^2}{3ab}=}$${\displaystyle \frac{c^2+1}{3ab}}$;

в) ${\displaystyle \frac{2x}{x+2}+\frac{6}{x+2}+\frac{x}{x+2}=}$${\displaystyle \frac{2x+6+x}{x+2}=}$${\displaystyle \frac{3x+6}{x+2}}$=

=${\displaystyle \frac{3\cancel{\left(x+2\right)}}{\cancel{\left(x+2\right)}}=}$${\displaystyle 3}$.