Y ^ 2 - 8y 16 July 8, 2019 16 32 64 128 Y 2 8y 16 Y 2 8y 16 0 Y 2 8y 16 factored Y 2 8y 16 64 Y 2 8y 16 factor Y 2 8y 16 factorise X 2 y 2 8y 16 Y 4 8y 2 16 0 Y 4 8y 2 16y 0 X 2 y 2 4x 8y 16 0 X 2 y 2 2xy 8x 8y 16 Y 4 8y 2 16 9 y 2 )- 8y =- 16