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### Question

If x = 0.7342, then what is the value of $11x + √{16x^2 - 8x + 1}$?

**A**

6.14.

**B**

12.28.

**C**

3.14.

**D**

3.07.

**Soln.**

**Ans: a**

By inspection, $11x + √{16x^2 - 8x + 1}$ is same as $11x + √{({1 - 4x})^2}$, which is same as 11x + (1 - 4x) = 1 + 7x = 6.14.