Question

4. (-\(\dfrac{1}{2}\)) -2.(-\(\dfrac{1}{2}\))\(^2\) +3. (-\(\dfrac{1}{2}\))+ 1

Answer 1

\(=\dfrac{-1}{2}-\dfrac{1}{2}+\dfrac{-3}{2}+1=\dfrac{-5}{2}+\dfrac{2}{2}=-\dfrac{3}{2}\)

Answer 2

\(=\dfrac{-1}{2}-\dfrac{1}{2}+\dfrac{-3}{2}+1=\left[\left(\dfrac{-1}{2}+\dfrac{-1}{2}\right)+1\right]+\dfrac{-3}{2}=\dfrac{-3}{2}\)