At what value of X does the function y = -3 – 2x + X2…

At what value of X does the function y = -3 – 2x + X² attain a minimum value?

Correct Answer: Option D

Explanation

Given that y = -3 – 2x + X²
then, (frac{dy}{dx}) = -2 + 2x
At maximum value, (frac{dy}{dx}) = O
therefore, -2 + 2x
2x = 2
x = ²/₂ = 1