Rationalise the denominator of the fraction 3/sqrt(5)
In order to rationalise the denominator we need to get rid of the surd (square-root) on the bottom of the fraction.
To do this, we can multiply the denominator by sqrt(5).
But we must notice that to keep the fraction the same, we must multiply the denominator and numerator by the same number.
Therefore, by multiplying the top and bottom of the fraction by sqrt(5), we get 3*sqrt(5)/5 as our rationalised fraction.
MM
Related Maths GCSE answers
All answers ▸Complete the square of x^2 + 10x -3
Write 16 × 8^(2x) as a power of 2 in terms of x
How do you complete the square?
Question: What proportion of the clock is the area covered when the time is 12:10? (Here the question should indicate the time stated and shade in the proportion of the clock to be computed.)