Question

simplify using identities (3x + y - 5) (3x - y -5)​

Answer 1

Answer:

$\: \:$

{(3x -5) +y} {(3x-5) -y}

= (3x-5) ² - y²

= 9x² - 30x -25 - y²

= 9x² - y² - 30x -25

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