Check your working again.
If v = -1.
x = 1,
y = -2
So 2xy = -4
Hence option A gives
Option B gives
What happens when ?
Another problem from the GRE program. Determine which option is greater:
x = v + 2
y = 2v
Option A: x^2 + y^2
Option B: (x+y)^2
I decided that B is greater because it results in: x^2 + y^2 + 2xy. So I guess that this 2xy makes the possitive difference. However, I have tried it out with v=1 and v=-1 and both of them are ok with my result, B is greater. However, in the corrections it says that it canīt be determined which one is greater. Could anyone help me to know why??
Thank you so much!
Hello, artabro!
Determine which option is greater: .
. .
I decided that B is greater because it results in:
So I guess that this makes the positive difference.
How do we know this is a positive difference?
Option A: .
Option B: .
How do they compare?
. . . . .
. .
. . . . .
. . . . .