Question

Factoriza 4x²-y²-6y-9

Answer 1

=4x²-(y²+6y+9)
=(2x)²-(y+3)²
=(2x+y+3)*(2x-y-3)

Answer 2

`4 x^(2) -y^(2) -6y-9 \\ 4 x^(2) = y^(2) +6y+9 \\ 4 x^(2) =(y+3)(y+3) \\ \sqrt{ 4x^(2) } = √((y+3)(y+3)) =\\2x=y+3\\2x-3=y`

y=2x-3