1 . a2+b2-c2+2aba2-b2+c2+2ac=?

• A. $a+b+c$
• B. $\frac{a+b-c}{a-b+c}$
• C. $\frac{a-b+c}{a+b-c}$
• D. $\frac{a+b-c}{a+b+c}$

Answer: Option B

Explanation:

2 . a2+b2-c2+2aba2-b2+c2+2ac=?

• A. $\frac{a+b-c}{a-b+c}$
• B. $\frac{a+b-c}{a+b+c}$
• C. $\frac{a-b+c}{a+b-c}$
• D. $\frac{a+b+c}{a+b-c}$

Answer: Option A

Explanation: