Question

given that √5 is irrational, prove that 2√5 - 3​

Answer 1

Answer:

ɪᴛ ɪs ɢɪᴠᴇɴ ᴛʜᴀᴛ √5 ɪs ɪʀʀɪᴛᴀᴛɪᴏɴᴀʟ.. sᴏ..

2*√5-3

-1√5 ɪғ ᴡᴇ ᴍᴜʟᴛɪᴘʟʏ √5 ᴡʜɪᴄʜ ɪs ɪʀʀɪᴛᴀᴛɪᴏɴᴀʟ ʙʏ -1 ᴛʜᴇɴ ᴛʜᴇ ᴀɴsᴡᴇʀ ᴡɪʟʟ ʙᴇ ɪʀʀɪᴛᴀᴛɪᴏɴᴀʟ..sᴏ 2√5-3 ɪs ᴀʟsᴏ ɪʀʀɪᴛᴀᴛɪᴏɴᴀʟ ɴᴜᴍʙᴇʀ