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2a+4b= 2(a+2b)

3a+6= 3(a+2)3a+3.2=

4a+6= 2.2a+2.3= 2(2a+3)

2a+2= 2a+2.1= 2(a+1)

a2+2ab= a.a+2ab= a(a+2b)

2b2+4ab = 2.b.b+2.2.a.b= 2b(b+2.a)

6ab2+9a2b= 3.2.a.b.b+3.3.a.a.b= 3ab(2b+3a)

3ab2+12a2b-4a3=

4xy2+6x2y-2xy=