At what value of X does the function y = -3 – 2x + X

^{2}attain a minimum value?-
**A.**

-1 -
**B.**

14 -
**C.**

4 -
**D.**

1

##### Correct Answer: Option D

##### Explanation

Given that y = -3 – 2x + X^{2}

then, (frac{dy}{dx}) = -2 + 2x

At maximum value, (frac{dy}{dx}) = O

therefore, -2 + 2x

2x = 2

x = ^{2}/_{2} = 1