solve-
81y²-9y²+6y-1
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Answered by
0
Answer:
(12y+1)(6y+1)
Step-by-step explanation:
81y^2 - 9y^2 + 6y - 1
= 72y^2 + 6y - 1
= 72y^2 + 12y - 6y - 1
= 12y(6y+1)+1(6y+1)
= (12y+1)(6y+1)
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Answered by
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Answer:
81 y^2-9y^2+6y-1
=81y^2-(9y^2-6y+1)
=(9y)^2-{(3y)^2-2.3y.1+(1)^1}
=(9y)^2-(3y-1)^2
={9y+(3y-1)}{9y-(3y-1)}
=(9y+3y-1)(9y-3y+1)
=(12y-1)(6y+1)
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