Here's the question you clicked on:
Calcmathlete
Let the solution (x, y, z) satisfy the following equations: x + y + z = -1, xy + xz + yx = -17, xyz = -15. If x < y < z, what is the value of: x - 2y + 4z?
And this is supposed to be a speed math question as in you should be able to do this in like 30 seconds...not sure how to do it though...
its also...vector like...
Seriously? That's like 5 questions that pertain to vectors when I have not learned them... :/
well for starter the biggest lead is xyz=-15 that shows me that there has to be a 1,3 and 5 involved
next x+y+z=-1 -5+3+1=-1
But when you plug it into xy + xz + yx, it doesn't work...
I think that also fails the x < y < z
well no u wld just switch around the variables that is no big deal
Maybe let x = -5, y = 1, z = 3
Did you mistype the problem? Or is it correct as written? Should it be "xy + xz + yz = -17" instead of "xy + xz + yx = -17?"
That's what it says on the document...thinking it's a typo though...
Alright. I think it is just a typo. Thanks swiss!