3m+3n-mx-nx= (3m+3n) - (mx+nx) = 3(m+n) - x(m+n)= (m+n)(3-x)
6a-15b= 3(2a-5b)
2a+ab= a(2+b)
7am+7bn= 7(am+bn)
4x³-12xy= 4x(x²-3y)
3m+3n-mx-nx= (3m+3n) - (mx+nx) = 3(m+n) - x(m+n)= (m+n)(3-x)
6a-15b= 3(2a-5b)
2a+ab= a(2+b)
7am+7bn= 7(am+bn)
4x³-12xy= 4x(x²-3y)