\(a,A=\left[6.\left(-\dfrac{1}{3}\right)^2-3.\left(-\dfrac{1}{3}\right)+1\right]:\left(-\dfrac{1}{3}-1\right)^2\\ \Rightarrow A=\left[6.\left(-\dfrac{1}{3}\right).\left(-\dfrac{1}{3}\right)-3.\left(-\dfrac{1}{3}\right)\right]:\left(-\dfrac{1}{3}-1\right)^2\\ \Rightarrow A=\left[-2.\left(-\dfrac{1}{3}\right)-3.\left(-\dfrac{1}{3}\right)\right]:\left(-\dfrac{4}{3}\right)^2\\ \Rightarrow A=\left[\left(-\dfrac{1}{3}\right).\left(-2-3\right)\right]:\dfrac{16}{9}\\ \Rightarrow A=\left[\left(-\dfrac{1}{3}\right).\left(-5\right)\right]:\dfrac{16}{9}\\ \Rightarrow A=\dfrac{5}{3}.\dfrac{9}{16}\\ \Rightarrow A=\dfrac{45}{48}.\)
A = [6.(-1/3)² - 3.(-1/3) + 1] : (-1/3 - 1)²
= (6.1/9 + 1 + 1) : (-4/3)²
= (2/3 + 2) : 14/9
= 8/3 : 16/9
= 3/2
