Powers and roots
A power is repeated multiplication: 5² = 5 × 5. The square root reverses it: √25 = 5. Areas and compound interest rely on this.
About: Powers and roots
A power is repeated multiplication: 5² = 5 × 5. The square root reverses it: √25 = 5. Areas and compound interest rely on this.
Worked examples
Calculate: 25
Answer: 32. 2 × … × 2 (5×) = 32.
Calculate: √169
Answer: 13. 13 × 13 = 169 → √169 = 13.
Calculate: 132
Answer: 169. 13 × 13 = 169.