The value of 32 - 128 + 50 correct to 3 places of decimal is 32 - 128 + 50 = ?

Answer: Option C

$$\begin{array}{rl}& \text{According to question,}\\ & \sqrt{32}-\sqrt{128}\text{ + }\sqrt{50}\\ & \Rightarrow \sqrt{16\times 2}-\sqrt{64\times 2}+\sqrt{25\times 2}\\ & \Rightarrow 4\sqrt{2}-8\sqrt{2}+5\sqrt{2}\\ & \Rightarrow \sqrt{2}\\ & \Rightarrow 1.414\end{array}$$