evaluate 78*82 using identity
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ʜᴇʏᴀ !!
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____________________
78 × 82
= ( 80 - 2 ) ( 80 + 2 )
= ( 80 )^2 - ( 2 )^2
[ ★ ( ᴀ )^2 - ( ʙ )^2 = ( ᴀ + ʙ ) ( ᴀ - ʙ ) ]
= 6400 - 4
= 6396
_____________________
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
★ ᴅᴇᴠɪʟ ᴋɪɴɢ
ʜᴇʀᴇ's ʏᴏᴜʀ ᴀɴsᴡᴇʀ
____________________
78 × 82
= ( 80 - 2 ) ( 80 + 2 )
= ( 80 )^2 - ( 2 )^2
[ ★ ( ᴀ )^2 - ( ʙ )^2 = ( ᴀ + ʙ ) ( ᴀ - ʙ ) ]
= 6400 - 4
= 6396
_____________________
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
★ ᴅᴇᴠɪʟ ᴋɪɴɢ
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