Question

2. Write the lowest rationalising factor of:

(viii) 15-3/2​

Answer 1

Answer:

root 2 is the lowest R.F.

Answer 2

15−3√2

step one : takinɡ out factor 3 out

3(5−√2)

then rationalizinɡ the numbers in bracket

3(5−√2)(5+√2)

then solvinɡ further

3[5²−(√2)²]

now

3(25−2)

3(23)

69.

The answer to the problem is 69

BUT

The answer of the question asked is Rationalizinɡ factor of 15−3√2 is 5+√2 bcoz we rationalized the ɡiven number only when we have this above number 5+√2.

Hope it helps you !!