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Question
Which is greater?
`6sqrt(5)` and `5sqrt(6)`
Sum
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Solution
Given: Compare `6sqrt(5)` and `5sqrt(6)`.
Step-wise calculation:
1. Square both expressions to compare without the square roots.
`(6sqrt(5))^2`
= 62 × 5
= 36 × 5
= 180
`(5sqrt(6))^2`
= 52 × 6
= 25 × 6
= 150
2. Since 180 > 150, it means `(6sqrt(5))^2 > (5sqrt(6))^2`.
3. Both `6sqrt(5)` and `5sqrt(6)` are positive numbers, so we can conclude `6sqrt(5) > 5sqrt(6)`.
`6sqrt(5)` is greater than `5sqrt(6)`.
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Chapter 1: Rational and Irrational Numbers - Exercise 1D [Page 28]
