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