Mathematics
Factorise :
x2y2 - 3xy - 40
Factorisation
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Answer
x2y2 - 3xy - 40
= x2y2 - (8 - 5)xy - 40
= x2y2 - 8xy + 5xy - 40
= (x2y2 - 8xy) + (5xy - 40)
= xy(xy - 8) + 5(xy - 8)
= (xy - 8)(xy + 5)
Hence, x2y2 - 3xy - 40 = (xy - 8)(xy + 5)
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