What are the x-intercepts of the quadratic function?

y = x2 + x – 2

A.
2 and 1

B.
1

C.
–2 and 1

D.
2 and –1

Question

What are the x-intercepts of the quadratic function?
 
        y = x2 + x – 2
 
 A.
2 and 1
 
 B.
1
 
 C.
–2 and 1
 
 D.
2 and –1

anonymous · Answer

These questions are hard. @Hero @s3a

s3a · Answer

Factor  y = x^2 + x – 2 by asking yourself what equals to the coefficient of x^2 (which is 1) times -2 (the constant term) = -2 and adds up to the coefficient of x (which is also, COINCIDENTALLY, 1). The answer to that is the numbers 1 and -1 such that
y = (x+1)(x-1) where x equals either -1 or 1 for y to equal 0.

THE VALUES OF x FOR WHICH y = 0 ARE CALLED ZEROES.

s3a · Answer

Wait, I may have made a mistake.

s3a · Answer

Yes, I did. Wait.

s3a · Answer

y = (x-1)(x+2) such that x = 1 or -2

anonymous · Answer

So its C right?