7x = (35)² - (21)² solve this plzz
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your answer is
7×=(35)^2-(21)^2
7×=1225-441
7×=784
×=784/7
×=112
7×=(35)^2-(21)^2
7×=1225-441
7×=784
×=784/7
×=112
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• 7x = ( 35 )^2 - ( 21 )^2
==> 7x = ( 35 + 21 ) ( 35 - 21 ) [ • ᴡᴇ ᴋɴᴏᴡ , ᴀ^2 - ʙ^2 = ( ᴀ + ʙ ) ( ᴀ - ʙ ) ]
==> 7x = 56 × 14 [ • ( 35 + 21 ) = 56 ᴀɴᴅ ( 35 - 21 ) = 14 ]
==> x = ( 56 × 14 ) / 7
==> x = 56 × 2
==> x = 112
sᴏ , ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x ɪs 112
_____________________
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
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ʜᴇʀᴇ's ʏᴏᴜʀ ᴀɴsᴡᴇʀ
______________________
• 7x = ( 35 )^2 - ( 21 )^2
==> 7x = ( 35 + 21 ) ( 35 - 21 ) [ • ᴡᴇ ᴋɴᴏᴡ , ᴀ^2 - ʙ^2 = ( ᴀ + ʙ ) ( ᴀ - ʙ ) ]
==> 7x = 56 × 14 [ • ( 35 + 21 ) = 56 ᴀɴᴅ ( 35 - 21 ) = 14 ]
==> x = ( 56 × 14 ) / 7
==> x = 56 × 2
==> x = 112
sᴏ , ᴛʜᴇ ᴠᴀʟᴜᴇ ᴏғ x ɪs 112
_____________________
ʜᴏᴘᴇ ɪᴛ ʜᴇʟᴘs ʏᴏᴜ ᴅᴇᴀʀ! :)
★ ᴅᴇᴠɪʟ ᴋɪɴɢ
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