factorise the given equation
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Hello!
xy ( a² + b² ) - ab ( x² + y² )
⇒ xya² + xyb² - x²ab - y²ab
⇒ xya² - x²ab + xyb² - y²ab
⇒ ax ( ay - bx) - by ( -bx + ay )
⇒ ( ax - by ) ( ay - bx )
Cheers!
xy ( a² + b² ) - ab ( x² + y² )
⇒ xya² + xyb² - x²ab - y²ab
⇒ xya² - x²ab + xyb² - y²ab
⇒ ax ( ay - bx) - by ( -bx + ay )
⇒ ( ax - by ) ( ay - bx )
Cheers!
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