a(m-n)(m+n)
3(3-x)(4+y)
-m^2(1-m^2)
2x(25x+9)
1) am^2-an^2= a(m^2-n^2)=a(m-n)(m+n)
2) 27x^2-12y^2=3(9x^2-4y^2)=2(3x-2y)(3x+2y)
3) -m^2+m^4=m^2(m^2-1)=m^2(m-1)(m+1)
4) 50x^3-18x=2x(25x^2-9)=2x(5x-3)(5x+3)
a(m-n)(m+n)
3(3-x)(4+y)
-m^2(1-m^2)
2x(25x+9)
1) am^2-an^2= a(m^2-n^2)=a(m-n)(m+n)
2) 27x^2-12y^2=3(9x^2-4y^2)=2(3x-2y)(3x+2y)
3) -m^2+m^4=m^2(m^2-1)=m^2(m-1)(m+1)
4) 50x^3-18x=2x(25x^2-9)=2x(5x-3)(5x+3)