2023年10月B卷练习(数易) · 第 19 题

\( -14\left(3x-4\right)^2+8\left(3x-2\right)^2 \) 
The given expression can be rewritten as\( \frac{a}{6}x^2+\frac{b}{6}x+\frac{c}{6} \) , where a, b, and c are constants. What is the value of a+b+ c?