r14 vs r15 | ||
---|---|---|
... | ... | |
28 | 28 | 식을 풀면 |
29 | 29 | |
30 | 30 | [math(\displaystyle \begin{aligned} \dfrac{1}{4a^{2}}(a+b+c)(a+c-b)(a+b-c)(b+c-a) \end{aligned})], |
31 | ||
31 | [math(\displaystyle \begin{aligned} \dfrac{1}{4a^{2}}\cdot 2s \cdot 2(s-b)\cdot 2(s-c)\cdot 2(s-a) \end{aligned})], |