753 Вправа 753Алгебра 8 клас Бевз 2025 · § 15 · стор. 145

753. Обчисли значення виразу.

а) ${\displaystyle \sqrt{8\cdot 50}=}$${\displaystyle \sqrt{400}=}$${\displaystyle 20}$;

б) ${\displaystyle \sqrt{40\cdot 90}=}$${\displaystyle \sqrt{3600}=}$${\displaystyle 60}$;

в) ${\displaystyle \sqrt{20\cdot 45}=}$${\displaystyle \sqrt{900}=}$${\displaystyle 30}$;

г) ${\displaystyle \sqrt{7\cdot 63}=}$${\displaystyle \sqrt{441}=}$${\displaystyle 21}$;

ґ) ${\displaystyle \sqrt{18\cdot 98}=}$${\displaystyle \sqrt{9\cdot 2\cdot 2\cdot 49}=}$${\displaystyle \sqrt{9\cdot 4\cdot 49}}$=

=${\displaystyle 3\cdot 2\cdot 7=}$${\displaystyle 42}$;

д) ${\displaystyle \sqrt{50\cdot 18}=}$${\displaystyle \sqrt{900}=}$${\displaystyle 30}$;

е) ${\displaystyle \sqrt{2,5\cdot 6,4}=}$${\displaystyle \sqrt{0,25\cdot 64}=}$${\displaystyle 0,5\cdot 8=}$${\displaystyle 4}$;

є) ${\displaystyle \sqrt{9,8\cdot 7,2}=}$${\displaystyle \sqrt{1,96\cdot 36}=}$${\displaystyle 1,4\cdot 6=}$${\displaystyle 8,4}$.