Question

Номер 2 плиз помогите )))

Answer 1

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