Factorise the following:
ab(x2+y2) - xy(a2+b2)
please help fast
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Answer:
abx 2 −aby 2 +xya 2 −xyb 2
abx 2 +xya 2 −aby 2 −xyb^ 2
ax(bx+ay)−by(ay+bx)
=(ax−by)(bx+ay)⇒(B)
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