Mathematics
36 - 60y + 25y2 is equal to :
(3 + 5y) (3 + 5y)
(3 - 5y) (6 - 5y)
(3 + 4y) (3 - 4y)
none of these
Factorisation
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Answer
36 - 60y + 25y2
Using the formula
[∵ (x + y)2 = x2 + y2 + 2xy]
= (6)2 - 2 x 6 x 5y + (5y)2
= (6 - 5y)2
= (6 - 5y)(6 - 5y)
Hence, option 4 is the correct option.
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