Question

Factorise- ab(x²+y²)-xy(a²+b²)​

Answer 1

Answer:

abx2−aby2+xya2−xyb2

abx2+xya2−aby2−xyb2

ax(bx+ay)−by(ay+bx)

=(ax−by)(bx+ay)⇒(B)

Answer 2

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Refer to the picture :)

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