(7a-9b)(7a -9b) solve using identity with process
Answers
Answered by
91
(7a - 9b)^2
[(a-b)^2 = a^2 + b^2 - 2ab]
therefore acc. to the identity,
(7a)^2 + (9b)^2 - 2 × 7a × 9b
49a^2 + 81b^2 - 126ab is the answer
[(a-b)^2 = a^2 + b^2 - 2ab]
therefore acc. to the identity,
(7a)^2 + (9b)^2 - 2 × 7a × 9b
49a^2 + 81b^2 - 126ab is the answer
Answered by
63
hope you understood my answer
Attachments:
Similar questions