1)m²-n²=(m-n)(m+n)
2)5x²-5y²=5(x²-y²)=5(x-y)(x+y)
3)50-2x²=2(25-x²)=2(5-x)(5+x)
4)mx²-m=m(x²-1)=m(x-1)(x+1)
5)y³-9y=y(y²-9)=y(y-3)(y+3)
1)m²-n²=(m-n)(m+n)
2)5x²-5y²=5(x²-y²)=5(x-y)(x+y)
3)50-2x²=2(25-x²)=2(5-x)(5+x)
4)mx²-m=m(x²-1)=m(x-1)(x+1)
5)y³-9y=y(y²-9)=y(y-3)(y+3)