MATHmatics(비교)

1. [math(\dfrac{b-2}3-\dfrac{1-b}2)]를 일차식으로 하기

[clearfix]

[math(\dfrac{b-2}3-\dfrac{1-b}2=\dfrac{6(b-2)}3-\dfrac{6(1-b)}2)]

2. 약분하기

[math(\dfrac{6(b-2)}3-\dfrac{6(1-b)}2=2(b-2)-3(1-b))]

[math(=5b-7)]