I just did an online test that had the question below. I have no Idea what it was asking. I know that y'= -2x. Although I was not sure why there was three answer boxes layed out like they where and I am even more confused with the answer they gave me at the end of the test.
Find derivative of y=−x^2+3.
y′=________ x^2 + __________ x+ ________________ .
Answer Key: 0, -2, 0 (numeric)
Can someone please Explain this to me?