Question

factorise:
ab(x2+y2)+xy(a2+b2)

Answer 1

Answer:

$ab( {x}^{2} + {y}^{2} ) + xy( {a}^{2} + {b}^{2} ) \\ ab {x}^{2} + ab {y}^{2} + xy {a}^{2} + xy {b}^{2}$