Question

9x^2-y^2+2y-1

Answer 1

\(9x^2-y^2+2y-1\)

\(=\left(3x\right)^2-\left(y^2-2y+1\right)\)

\(=\left(3x\right)^2-\left(y-1\right)^2\)

\(=\left(3x+y-1\right)\left(3x-y+1\right)\)

Answer 2

$flo$

`9x^2 - y^2 + 2y - 1`

`= (3x)^2 - (y^2 -2y + 1)`

`= (3x)^2 - (y-1)^2`

`= (3x - y - 1)(3x +y - 1)`