Mathematics
Factorise by grouping method :
y2 - (a + b)y + ab
Factorisation
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Answer
Given,
y2 - (a + b)y + ab
= y2 - ay - by + ab
= y(y - a) - b(y - a)
= (y - a)(y - b).
Hence, y2 - (a + b)y + ab = (y - a)(y - b).
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