This animation walks through four square-root expressions, simplifying each by factoring out perfect squares to reveal whether the result is rational or irrational. It shows step-by-step how terms like √18 and √50 reduce to multiples of √2, then combine or cancel with other radical terms. The key idea is that like radicals can cancel to leave rational values like 0 or 2. Useful for students learning to classify numbers and simplify radical expressions.
Narrated · 16:9 · Preview before teaching · automatic layout checks do not establish subject accuracy
Manakah yang merupakan bilangan rasional . Mari Kita sederhanakan satu per satu. A. \sqrt{18}-2\sqrt2 \sqrt{18}=\sqrt{9\times2}=3\sqrt2 Maka: 3\sqrt2-2\sqrt2=\sqrt2 \sqrt2 adalah bilangan irasional. ❌ ⸻ B. \sqrt{50}-5\sqrt2 \sqrt{50}=\sqrt{25\times2}=5\sqrt2 Maka: 5\sqrt2-5\sqrt2=0 0 adalah bilangan rasional. ✅ ⸻ C. \sqrt8-2\sqrt2 \sqrt8=\sqrt{4\times2}=2\sqrt2 Maka: 2\sqrt2-2\sqrt2=0 0 adalah bilangan rasional. ✅ ⸻ D. \sqrt{27}-3\sqrt3+2 \sqrt{27}=\sqrt{9\times3}=3\sqrt3 Maka: 3\sqrt3-3\sqrt3+2=2 2 adalah bilangan rasional.