xy-2y=y(x-2)
16a²-81=(4a-9)(4a+9)
3x²-6x³=3x²(1-2x)
x²-10x+25=(x-5)²
2a²-4ab+2b²=2(a²-2ab+b²)=2(a-b)²
xy-2y=y(x-2)
16a²-81=(4a-9)(4a+9)
3x²-6x³=3x²(1-2x)
x²-10x+25=(x-5)²
2a²-4ab+2b²=2(a²-2ab+b²)=2(a-b)²