俊狼猎英团队为您解答

x²-4y² =(X+2Y)(X-2Y)
a²+a =a(a+1)
4ab-2a²b=2ab(2-a)
9m²-m² =8m^2
2am²-8a=2a(m^2-4)=2a(m+2)(m-2)
3x+3y=3(X+Y)
-24m²x-16n²x =-8X(3m^2+2n^2)
x²-1=(X+1)(X-1)
（xy）²-1 =(XY+1)(XY-1)
a四次方x²-a四次方y²=a^4(X^2-Y^2)=a^4(X+Y)(X-Y)