Question

solve-

81y²-9y²+6y-1​

Answer 1

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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Answer 2

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)