SOLUTION: how do i find the discriminant of -x squared minus x = 4

Question 210191: how do i find the discriminant of -x squared minus x = 4
Found 2 solutions by jim_thompson5910, stanbon:
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the given equation.

Subtract 4 from both sides.

From we can see that , , and

Start with the discriminant formula.

Plug in , , and

Square to get

Multiply to get

Subtract from to get

So the discriminant is -15.
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
find the discriminant of -x squared minus x = 4
-----------------
Rearrange:
-x^2 - x - 4 = 0
x^2 + x + 4 = 0
--------------------------
discriminant = b^2 -4ac = 1^2 - 4*1*4 = 1-16 = -15
=========================================================
Cheers,
Stan H.
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