Question

64y²-16x²

Answer 1

\(=16\left(4y^2-x^2\right)=16\left(2y-x\right)\left(2y+x\right)\)

Answer 2

=16(4y^2-x^2)=16(2y-x)(2y+x)

Answer 3

`= (8y)^2 - (4x)^2`

`= (8y - 4x)(8y+4x)`

`= 16(2y-x)(2y+x)`

Answer 4

\(=\left(8y-4x\right)\left(8y+4y\right)=16\left(2y-x\right)\left(2y+x\right)\)