\(\sqrt {125}\) থেকে √5 বিয়োগ করলে বিয়োগফল হবে – (a) \(\sqrt{80}\) (b) \(\sqrt{120}\) (c) \(\sqrt{100}\) (d) কোনোটিই নয়।
Loading content...
Answer: A
\(\sqrt{125}=\sqrt{5×5×5}=5√5\)
\(∴ \sqrt{125}-√5=5√5-√5=4√5=\sqrt{5×4×4}=\sqrt{80}\)
\(\sqrt{125}=\sqrt{5×5×5}=5√5\)
\(∴ \sqrt{125}-√5=5√5-√5=4√5=\sqrt{5×4×4}=\sqrt{80}\)