Question

If 4-5root3 will come in 4 mark so we have to prove first root3 is irrational then 4-5root3 or not?

Answer 1

yes first you can prove root3 as irrational .....and then follow the steps in the pic...

Answer 2

when it comes as 4 mark question, prove that root3 is irrational and then prove that 4-5root3 is irrational.

If it comes as 2 mark question, you can directly prove that 4-5root3 is irrational.

Best of luck for tomorrow's board exam!

hope you do well!