question_answer

The sides of an equilateral triangle are (2a - b + 5), (a + b) and (2b - a + 2). What is the area of the triangle?

A) \[\frac{\sqrt{3}}{4}\times {{a}^{2}}\]              

B) \[\frac{\sqrt{3}}{4}\times {{b}^{2}}\]  

C)   \[\frac{\sqrt{3}}{4}\times 49\]    

D)   \[\frac{\sqrt{3}}{4}\times 81\]