(-3/5x-2/9y)×(15x-9y)
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= 3/5x×(15x-9) - 2/9y×(15x-9)
= 9x²-27/5xy-10/3xy+2y²
=9x²-81-50/15xy+2y²
= 9x²-131/15xy+2y² (due to - , - = +)
Hope it will help.
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