Question

(3x + y - 5) (3x - y - 5).
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Answer 1

HERE IS THE PROCESS DEAR ☺

Q. ( 3X + Y -5) ( 3X -Y- 5)

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

= (3x) ² - ( y-5)²

= 9x² - (y²+(5)²-2×y×5)

= 9x² - y²-25 + 10y

(here you are thinking that the signs are change but just remind that if there is minus sign before bracket then the sign in the bracket will also change)

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thankyou ❤

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Answer 2

Please mark me as brainliest and hope it helps