幾條簡單既中2

1.
2x+ax
=x(2+a)

2.
3x+6y
=3(x+2y)

3.
7a+abc
=a(7+bc)

4.
ax+bx
=x(a+b)

5.
7xy+49y
=7y(x+7)

6.
2+4a+6a^2
=2+2a(2+3a)
=2(1+a(2+3a))
or
=2(1+2a+3a^2)

唔知啱唔啱呢?

2x+ax
= x(2+a)

3x+6y
= 3(x+2y)

7a+abc
= a(7+bc)

ax+bx
= x(a+b)

7xy+49y
= 7y(x+7)

2+4a+6a^2
= 2(1+2a+3a^2)