Simplyfiy the following expression.
(3x + 17 - 2y) (3x - 17 - 2y)
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 9x2 - 12xy + 4y2 - 289.
Given that, (3x + 17 - 2y) (3x - 17 - 2y)
⇒ 3x(3x - 17 - 2y) + 17(3x - 17 - 2y) - 2y(3x - 17 - 2y)
⇒ 9x2 - 51x - 6xy + 51x - 289 - 34y - 6xy + 34y + 4 y2
⇒ 9x2 - 12xy + 4y2 - 289
HEnce the required answer is 9x2 - 12xy + 4y2 - 289.