| r5 vs r6 | ||
|---|---|---|
| ... | ... | |
| 5 | 5 | [math(|lx|=\dfrac{1}3)] |
| 6 | 6 | [clearfix] |
| 7 | 7 | <math>20.</math> [math(\dfrac{b-2}3-\dfrac{1-b}2)]를 간단히 하면? [<math>4</math>점] |
| 8 | ||
| 9 | 1. [math(\dfrac{b-2}3-\dfrac{1-b}2)]를 일차식으로 하기 | |
| 10 | [clearfix] | |
| 11 | [math(\dfrac{b-2}3-\dfrac{1-b}2=\dfrac{6(b-2)}3-\dfrac{6(1-b)}2)] | |
| 12 | [clearfix] | |
| 13 | 2. 약분하기 | |
| 14 | [clearfix] | |
| 15 | [math(\dfrac{6(b-2)}3-\dfrac{6(1-b)}2=2(b-2)-3(1-b))] | |
| 16 | [clearfix] | |
| 17 | 3. 동류항끼리 계산 | |
| 18 | [clearfix] | |
| 19 | [math(2(b-2)-3(1-b)=2b-4-3+3b)] | |
| 20 | [math(=5b-7)] |