factorise- ab(x²+y²) - xy(a²+b²)
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=>ab(x2+y2)-xy(a2+b2)
=>abx2+aby2-a2xy-b2xy
=>abx2-a2xy-b2xy+aby2
=>ax(bx-ay)-by(bx-ay)
=>(bx-ay)(ax-by)
banerjeehritama:
thaaaaaaankssssss
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