Factorise : 9 (x+y)²- 16 (x - 3y)² pls answer i will mark as brainlist
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sol. 9(x+y)^ - 16 (x-3y)^=0
9 (x^ +2xy +y^) - 16 (x^-6xy+9y^)=0
9x^ +18xy +9y^- 16x^ + 96xy - 144y^=0
9x^-16x^+9y^-144y^+18xy+ 96xy
-7x^ - 135y^ + 114xy = ans..
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