(a^2+b^2)xy - ab (x^2 + y^2)
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Hi ,
( a² + b² ) xy - ab ( x² + y ² )
= a² xy + b²xy - abx² - aby²
= a² xy - abx² + b² xy - aby²
= ax( ay - bx ) + by( bx - ay )
= ax( ay - bx ) - by ( ay - bx )
= ( ay - bx ) ( ax - by )
I hope this helps you.
:)
( a² + b² ) xy - ab ( x² + y ² )
= a² xy + b²xy - abx² - aby²
= a² xy - abx² + b² xy - aby²
= ax( ay - bx ) + by( bx - ay )
= ax( ay - bx ) - by ( ay - bx )
= ( ay - bx ) ( ax - by )
I hope this helps you.
:)
gurleenchauhan:
thnku a lot. But actually I am unable to understand last second step . why we have changed sign of (by)
if change the sign then only we get a common terms
observe third line and forth line
sry , 4th and 5th lines
OK thnx
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